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Home My WebLink About6197 EL CAMINO REAL; ; US0800848/15/24, 10:52 AM US080084 Permit Data City of Carlsbad Hazardous Installations 6197 EL CAMINO Job Address: REAL Permit Type: HI Parcel No: 2131000700 Lot #: 0 Reference No.: Permit No: US080084 Status: ISSUED Applied 9/8/2008 Approved: 9/9/2008 Issued: 9/9/2008 PC #: Inspector: Project Title: VIASAT PALLET RACK PLAN CHECK & INSPECTIONS Applicant: COLBRESE MATERIAL HANDLING SUITE 3 12600 STOWE POWAY, CA 858-486-6920 Owner: WALTON CWCA NORTHPOINTE 76 LLC WALTON STREET CAPITAL P0 BOX 4900 SCOTTSDALE AZ Fees ($) Add'I Fees ($) Total ($) Balance ($) 308 0 308 0 about:blank 1/1 THERE ARE NO PLANS ASSOCIATED WITH THIS PERMIT Fire and Life Safety Consulting Anne Marie Bland Uj S Fire Code Compliance Report ViaSat 6197 El Camino Real Carlsbad, CA S C-) • • P.O. Box 1643 Carlsbad, CA 92018-1643 Telephone (760) 434-7885 Fax (760) 729-1139 • 0AIIRR%LSXD Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 Telephone (760) 434-7885 Fax (760) 729-1139 September 2, 2008 Carlsbad Fire Department Fire Prevention 1635 Faraday Avenue Carlsbad, CA 92008 Re: Fire Code Compliance Report - High-Piled Storage Project: ViaSat, Inc. 6197 El Camino Real Bldg. 6.5 Carlsbad I OVERVIEW The information presented herein has been prepared at the request of the rack contactor, Nick Coibrese, Coibrese Material Handling. This "Fire Code Compliance Report" addresses conditions applicable to the storage of commodities within an existing warehouse for compliance with the California Fire and Building Codes and nationally recognized standards. H CONTACTS Compliance with the California Codes and nationally recognized standards is based on information on the storage of materials and operations that occur within the building as provided by the following contacts: ViaSat, Inc. Bill Griswold (760) 473-7583 W Coibrese Material Handling Nick Colbrese (858)442-7086 • • • Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 T (760) 434-7885 F(760) 729-1139 ViaSat Page 2 of 9 HI SCOPE/PROJECT DESCRIPTION This report is intended to address the minimum requirements specific to high-piled storage of engineering and electrical parts, building supplies, and miscellaneous office equipment and supplies. It is not intended to be an architectural or engineering analysis and will be submitted as a supplement to storage rack plans. Discrepancies between the information presented herein and actual conditions presented on the plans are the responsibility of ViaSat, Inc. Verification of compliance with requirements and provisions addressed herein rests with the authority having jurisdiction and is outside the scope of this report. Storage rack plans and calculations will be submitted by Colbrese Material Handling. IV PURPOSE OF REPORT Identify and develop methods of protection from hazards presented by storage conditions. Provide an analysis relative to the acceptance of technologies, processes, products, facilities, materials and use attending the operation and use of the building. V REPORT ELEMENTS Provide a commodity analysis, detail methods of storage and recommend maintenance guidelines in accordance with recognized standards. Determine fire protection and life-safety requirements for rack storage of high-piled combustible materials in accordance with fire code requirements and national standards. Set limitations or conditions of operations necessary to achieve and maintain control of materials or operations and recommend mitigation of hazards and compliance with applicable code requirements. Evaluate building egress system including aisles separating rack storage systems. Outline general safety procedures for occupant safety and building protection. Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 T (760) 434-7885 F(760) 729-1139 ViaSat Page 3 of VI CODE ANAL YSIS/TECHNICAL REFERENCES The purpose of the Code analysis is to provide ViaSat, Inc. with technical information and references applicable to both the arrangement and maintenance of storage operations. The following applicable codes and standards will be used for this evaluation: > 2007 California Building Code (CBC) 2007 California Fire Code (CFC) > 2002 National Fire Protection Association Standard 13 (NFPA 13)* *NFPA 13 incorporates the storage requirements previously located in NFPA 231 and 231C VII BUILDING DATA AND OCCUPANCY CLASSIFICATION" Type of Building Construction: Number of Stories: Occupancy Classification: Ceiling Height: Building Area: **Information obtained from rack plans III 1 B, S-1 Up to 26 ft. B occupancy - approx. 10,000 sq. ft. S-i occupancy - approx. 4,400 sq. ft. Total - approx. 14,400 sq. ft. Use of Hazardous Materials Flammable and combustible liquids and hazardous materials will not be stored within the high- piled storage area of the building. VIII DEFINITIONS Carton. Cardboard or fiberboard box enclosing a product. CFC Cartoned. A method of storage consisting of corrugated cardboard or paperboard containers fully enclosing the commodity. NFPA 13 Conventional Pallets. A material-handling aid designed to support a unit load with openings to provide access for material-handling devices. NFPA 13 Double-Row Racks. Two single-row racks placed back-to-back having a combined width up to 12 ft, with aisles at least 3.5 ft on each side. NFPA 13 Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 T (760) 434-7885 F(760) 729-1139 ViaSat Page 4 of 9 Encapsulation. A method of packaging consisting of a plastic sheet completely enclosing the sides and top of a pallet load containing a combustible commodity or a combustible package or a group of combustible commodities or combustible packages. Combustible commodities individually wrapped in plastic sheeting and stored exposed in a pallet load also are to be considered encapsulated. Banding (i.e., stretch-wrapping around the sides only of a pallet load) is not considered to be encapsulation. Where there are holes or voids in the plastic or waterproof cover on the top of the carton that exceeds more than half of the area of the cover, the term encapsulated does not apply. The term encapsulated does not apply to plastic-enclosed products or packages inside a large, non-plastic, enclosed container. Encapsulation is not a factor for Group A plastic storage. NFPA 13 High-Piled Storage. Storage of combustible materials in closely packed piles or combustible materials on pallets, in racks or on shelves where the top of the storage is greater than 12 ft. in height and high-hazard commodities, such as Group A plastics, where the top of the of storage is greater than 6 ft. in height. CFC Longitudinal Flue Space. The space between rows of storage perpendicular to the direction of loading. NFPA 13 and CFC Rack. Any combination of vertical, horizontal, and diagonal members that supports stored materials. Some rack structures use solid shelves. Racks can be fixed, portable, or movable. Loading can be manual using lift trucks, stacker cranes, or hand placement, or automatic using machine-controlled storage and retrieval systems. NFPA 13 Shelf Storage. Storage on structures less than 30 in. deep with the distance between the shelves not exceeding 3 feet vertically. Shelving units stored back-to-back are defined as rack storage. CFC and NFPA 13 Single-Row Racks. Racks that have no longitudinal flue space and that have a width up to 6 ft with aisles at least 3.5 ft from other storage. NFPA 13 Solid Shelving. Solid shelving is fixed in place, slatted, wire mesh or other type of shelves located within racks. The area of a sold shelf is defined by perimeter aisle or flue space on all four sides. Solid shelves having an area equal to or less than 20 sq. ft. shall be defined as open racks. Shelves of wire mesh, slats, or other materials more than 50 percent open and where the flue spaces are maintained shall be defined as open racks. NFPA 13 Transverse Flue Space. The space between rows of storage parallel to the direction of loading. NFPA 13 and CFC IX SPECIAL USE PERMIT High-piled storage areas require a "Special Use Fire Permit" per CFC Section 105. The Carlsbad Fire Department should be contacted for permit requirements. Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 T (760) 434-7885 F(760) 729-1139 ViaSat Page 5 of WAREHOUSE STORAGE The information presented herein represents proposed storage conditions as described to and understood by the report preparer. This report will determine ceiling sprinkler and fire code requirements based on the commodity classification and storage arrangement. Commodity and storage arrays are described in the following sections of this report. X HIGH-PILED RACK STORAGE Commodities are classified as Class I-TV with a maximum storage height of 20 feet. Fire sprinkler density will be based on the highest hazard commodity stored in racks. Shelving in racks will be non-solid, open wire mesh. [Technical Reference 1] Rack Storage up to 20 fret Comm oditp Office furniture Building supplies - doors, glass, etc. HVAC units Antennas and mounts Miscellaneous engineering equipment (metal) *Cartoned miscellaneous office products Small rolls of carpet - similar to rugs Storage Array Proposed Area Used for High-piled Storage Aisle Width: Type of Rack: Type of Shelves in racks: Pallet Type: Storage Height: Commodity Class: Warehouse Ceiling Height: Flue Space Required: Existing Ceiling Sprinkler System: Existing Ceiling Sprinkler Spacing: Existing Ceiling Sprinkler Head: Clearance from Storage to Sprinkler Deflector: Commodity Classification Class IV Class III Class I Class I Class I Class III, IV Class IV Approx. 1,840 sq. ft. >8 ft. Single and Double-Row Open, Non-solid shelving Conventional wooden Up to and including 20 ft. Class I-N Maximum 26 ft. 6" transverse or, 3" transverse with 6" longitudinal .45/3000 <1= 100 sq. ft./head ELO-231B 11.2K, 286° At least 18 inches *Ordinary cardboard cartons. Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 T (760) 434-7885 F(760) 729-1139 ViaSat Page 6 of 9 XI FIRE PROTECTION AND LIFE-SAFETY REQUIREMENTS Hi.gh-Piled Rack Storajie Fire Protection: Iii dU cord inc c i th N I P \ 13 1 able 12.3.2.1 2, storage of nonencap$uLlted Class IV commodities in Idc!K- O\ ci 12 II and up to and including 20 ft must be in accordance viih Figure 12.3..11a Pci till', flurc. ing1c or double row racks with minimum 8 ft aisles and 286° ceiling sprinkici must compl\ v Ii curve F. Minirnuiri ceiling sprinkler density required is .495/2000 lollo\\in(_' INc curc to )UO sq ft design area results in a minimum density of .4475/3000. 1 Nc c\iting dcnit\ IS adcquatc for the proposed storage. [Technical Reference 4 Storage-Type Sprinklers For required densities greater than .34 gpmlsq. ft., standard response spray sprinklers with a K- factor of 11.2 or larger shall be used. The existing fire sprinkler K-factor is adequate for the proposed use. System Protection Area Limitation The maximum area of high-piled storage area and adjacent light or ordinary hazard areas protected by one riser is 52,000 sq. ft. Of that total, a maximum of 40,000 sq. ft. may be used for high-piled storage. The existing sprinkler system protecting the warehouse area meets this requirement. Flue Spaces, High-Piled Storage: Per CFC Table 2308.3, in single-row racks without solid shelves, 3" transverse flue spaces between loads at rack uprights must bemaintained. In double- row racks, 3" transverse and 6" longitudinal flue spaces must be provided, or, 6" transverse flue spaces without longitudinal flue spaces is also permitted. Random variations in the width of flue spaces or in their vertical alignment are permitted. [Technical Reference 3] Steel Column Protection: Steel building columns located within the high-piled rack structure and immediately adjacent to the rack structure shall be protected by sidewall sprinklers installed at the 15 ft. elevation, pointed toward one side of the steel column. Aisles Aisles formed by the rack structures shall not create "dead end aisles" greater than 20 ft. in length. Racks ending perpendicular to a wall must be at least 24 inches from the wall or provided with a 6 ft 8 in pass-through so as not to create a dead end aisle situation. The proposed rack arrangement does not create dead end aisles. General Fire Protection and Life Safety Requirements Per CFC Table 2306.2, an automatic fire extinguishing system is required and fire detection system, building access, smoke and heat removal, and draft curtains are not required for high- piled storage of Class I-TV commodities in areas up to 2,500 sq ft. [Technical Reference 4] S Fire and Life Safety Consulting S Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 T (760) 434-7885 F(760) 729-1139 ViaSat Page 7of9 Fire Extinguishers Fire extinguishers will be placed at well-marked strategic points throughout the storage area so that one or more portable fire extinguisher units can quickly be made available for use at any point. The minimum "A" rating per fire extinguisher is 4A. The corresponding "B" rating for a 4A extinguisher is 20. Travel distance to any extinguisher must not exceed 75 ft. and the maximum square footage covered per extinguisher is 4,000 square feet. XII EGRESS SYSTEM The building will comply with applicable code requirements for egress. The basic layout of the high-piled storage area will be in conformance with the exiting and egress requirements of CFC and CBC. All exit doors are at least 3 feet wide and 6' 8" in height. Proper exit signs will be provided over each exit doorway. Travel distance to a required exit from high-piled storage warehouse will not exceed 250 feet. Exit Doors Openable from the inside without the use of a key or special knowledge. Maintained accessible and free from obstructions at all times. Minimum Number A minimum number of 2 exits are required for the following: S-i Occupancy: >1= 30 occupant load B Occupancy: >1= 50 occupant load Exit Paths Illuminated whenever the building is occupied. >1= 1 foot candle at floor level. Identified by exit signs in accordance.. Exit signs illuminated at all times with either self-luminous signs or power supply provided by building wiring with 1.5 hour battery backup. (For areas requiring 2 or more exits.) Aisles Provided from all occupied points of the exit access in rack storage. In sprinklered buildings: =1>44 inches. Rack structural supports may cross aisles at a height of 6' 8". "Dead end aisles" greater than 20 ft. formed by the rack structure will not be present in the proposed storage arrangement. Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 T (760) 434-7885 F(760) 729-1139 ViaSat Page 8of9 XIII HYDRANTS, FIRE DEPARMENT CONNECTION AND SPRINKLER VALVES A clearance of three feet will be maintained around the circumference of fire protection S equipment such as the fire sprinkler risers, fire hydrants, sprinkler control valves, fire department connections, and fire extinguishers. All equipment will be maintained operable with periodic testing and maintenance performed as required by NFPA and CFC. XIV FIRE DEPARTMENT ROAD WA YA CCESS Existing access roads will be maintained within 150 feet of all portions of the building's exterior walls. XV GENERAL SAFETYPROCEDURES No smoking will be permitted in the storage area. "No Smoking" signs will be posted. > All employees will receive special training on the use of portable fire extinguishers of the type to be provided in this building. > Exit doors and building access doors will be maintained unobstructed and will be opened weekly to ensure their operation. > Exits and building access doors will not be obstructed by storage or rack structures. > Storage commodity, height, flue spaces, aisle widths and building protection systems must be maintained in accordance with the terms of this report. XVI CONCLUSION Based on the code research conducted in support of the development of this fire protection plan and the recommendations provided herein, the high-piled storage area will be in full compliance with the 2007 editions of the California Building and Fire Codes and 2002 NFPA 13 standard. This fire protection plan is complete and provides an adequate level of fire and life safety for the occupants of the building. If, after reviewing this report, you have any questions or comments, or you are in need of further information, please do not hesitate to contact me. I look forward to working with you to resolve any issues that may arise, and will be awaiting your response. Thank you. S S Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 T (760) 434-7885 F(760) 729-1139 ViaSat Page 9 of 9 Best regards, a/1L Anne Marie Bland, CA Certified FPO III Code Consultant * Recommendations are based on information supplied by ViaSat and Coibrese Material Handling. Any discrepancies between actual conditions and information contained in this report will invalidate these recommendations. Verification of compliance with requirements and provisions addressed herein rests with the authority having jurisdiction and is outside the scope of this report. This report is not intended as an engineering analysis but rather a summary of applicable code requirements. S Technical Reference 1 S S S S S 0 HIGH-PILED COMBUSTIBLE STORAGE storage is greater than 12 feet (3658 mm) in height. When required by the fire code official, high-piled combustible stor- age also includes certain high-hazard commodities, such as rubber tires, Group A plastics, flammable liquids, idle pallets and similar commodities, where the top of storage is greater than 6 feet (1829 mm) in height. HIGH-PILED STORAGE AREA. An area within a building which is designated, intended, proposed or actually used for high-piled combustible storage. LONGITUDINAL FLUE SPACE. The flue space between rows of storage perpendicular to the direction of loading. MANUAL STOCKING METHODS. Stocking methods uti- lizing ladders or other nonmechanical equipment to move stock. MECHANICAL STOCKING METHODS. Stocking meth- ods utilizing motorized vehicles or hydraulic jacks to move stock. SHELF STORAGE. Storage on shelves less than 30 inches (762 mm) deep with the distance between shelves not exceed- ing 3 feet (914 mm) vertically. For other shelving arrange- ments, see the requirements for rack storage. SOLID SHELVING. Shelving that is solid, slatted or of other construction located in racks and which obstructs sprinkler dis- charge down into the racks. TRANSVERSE FLUE SPACE. The space between rows of storage parallel to the direction of loading. SECTION 2303 COMMODITY CLASSIFICATION 2303.1 Classification of commodities. Commodities shall be classified as Class I, II, m, IV or high hazard in accordance with this section. Materials listed within each commodity clas- sification are assumed to be unmodified for improved combus- tibility characteristics. Use of flame-retarding modifiers or the physical form of the material could change the classification. See Section 2303.7 for classification of Group A, B and C plastics. 2303.2 Class I commodities. Class I commodities are essen- tially noncombustible products on wooden or nonexpanded polyethylene solid deck pallets, in ordinary corrugated cartons with or without single-thickness dividers, or in ordinary paper wrappings with or without pallets. Class I commodities are allowed to contain a limited amount of Group A plastics in accordance with Section 2303.7.4. Examples of Class I com- modities include, but are not limited to, the following: Alcoholic beverages not exceeding 20-percent alcohol Appliances noncombustible, electrical Cement in bags Ceramics Dairy products in nonwax-coated containers (excluding bottles) Dry insecticides Foods in noncombustible containers Fresh fruits and vegetables in nonplastic trays or containers Frozen foods Glass Glycol in metal cans Gypsum board Inert materials, bagged Insulation, noncombustible Noncombustible liquids in plastic containers having less than a 5-gallon (19 L) capacity Noncombustible metal products 2303.3 Class II commodities. Class II commodities are Class I products in slatted wooden crates, solid wooden boxes, multi- ple-thickness paperboard cartons or equivalent combustible packaging material with or without pallets. Class II commodi- ties are allowed to contain a limited amount of Group A plastics in accordance with Section 2303.7.4. Examples of Class II commodities include, but are not limited to, the following: Alcoholic beverages not exceeding 20-percent alcohol, in combustible containers Foods in combustible containers Incandescent or fluorescent light bulbs in cartons Thinly coated fine wire on reels or in cartons 2303.4 Class 111 commodities. Class 111 commodities are commodities of wood, paper, natural fiber cloth, or Group C plastics or products thereof, with or without pallets. Products are allowed to contain limited amounts of Group A or B plas- tics, such as metal bicycles with plastic handles, pedals, seats and tires. Group A plastics shall be limited in accordance with Section 2303.7.4. Examples of Class ifi commodities include, but are not limited to, the following: Aerosol, Level 1 (see Chapter 28) Combustible fiberboard Cork, baled Feed, bagged Fertilizers, bagged Food in plastic containers Furniture: wood, natural fiber, upholstered, nonplastic, wood or metal with plastic-padded and covered arm rests Glycol in combustible containers not exceeding 25 percent Lubricating or hydraulic fluid in metal cans Lumber Mattresses, excluding foam rubber and foam plastics Noncombustible liquids in plastic containers having a capacity of more than 5 gallons (19 L) Paints, oil base, in metal cans Paper, waste, baled Paper and pulp, horizontal storage, or vertical storage that is banded or protected with approved wrap Paper in cardboard boxes 280 2007 CALIFORNIA FIRE CODE S S . Pillows, excluding foam rubber and foam plastics Plastic-coated paper food containers Plywood . Rags, baled . Rugs, without foam backing Sugar, bagged Wood, baled Wood doors, frames and cabinets Yarns of natural fiber and viscose .23035 Class P/ commodities. Class N commodities are '. Class I, H or ifi products containing Group A plastics in ordi- nary corrugated cartons and Class 1,11 and ifi products, with Group A plastic packaging, with or without pallets. Group B plastics and free-flowing Group A plastics are also included in S this class. The total amount of nonfree-flowing Group A plas- tics shall be in accordance with Section 2303.7.4. Examples of 5 Class IV commodities include, but are not limited to, the . following: Aerosol, Level 2 (see Chapter 28) S Alcoholic beverages, exceeding 20-percent but less than 5 80-percent alcohol, in cans or bottles in cartons. . Clothing, synthetic or nonviscose • Combustible metal products (solid) , Furniture, plastic upholstered S Furniture, wood or metal with plastic covering and padding 5 Glycol in combustible containers (greater than 25 percent S and less than 50 percent) S Linoleum products Paints, oil base in combustible containers 5 Pharmaceutical, alcoholic elixirs, tonics, etc. 5 Rugs, foam back 5 Shingles, asphalt S Thread or yarn, synthetic or nonviscose 2303.6 High-hazard commodities. High-hazard commodi- ties are high-hazard products presenting special fire hazards S . beyond those of Class I, 11,111 or IV. Group A plastics not other- wise classified are included in this class. Examples of 5 high-hazard commodities include, but are not limited to, the S following: Aerosol, Level 3 (see Chapter 28) S . Alcoholic beverages, exceeding 80-percent alcohol, in bot- tles or cartons S Commodities of any class in plastic containers in carousel storage •... Flammable solids (except solid combustible metals) . Glycol in combustible containers (50 percent or greater) . Lacquers, which dry by solvent evaporation, in metal cans or cartons S Lubricating or hydraulic fluid in plastic containers 2007 CALIFORNIA FIRE CODE HIGH-PILED COMBUSTIBLE STORAGE Mattresses, foam rubber or foam plastics Pallets and flats which are idle combustible Paper, asphalt, rolled, horizontal storage Paper, asphalt, rolled, vertical storage Paper and pulp, rolled, in vertical storage which is unbanded or not protected with an approved wrap Pillows, foam rubber and foam plastics Pyroxylin Rubber tires Vegetable oil and butter in plastic containers 2303.7 Classification of plastics. Plastics shall be designated as Group A, B or C in accordance with this section. 2303.7.1 Group A plastics. Group A plastics are plastic materials having a heat of combustion that is much higher than that of ordinary combustibles, and a burning rate higher than that of Group B plastics. Examples of Group A plastics include, but are not limited to, the following: ABS (acrylonitrile-butadiene-styrene copolymer) Acetal (polyformaldehyde) Acrylic (polymethyl methacrylate) Butyl rubber EPDM (ethylene propylene rubber) FRP (fiberglass-reinforced polyester) Natural rubber (expanded) Nitrile rubber (acrylonitrile butadiene rubber) PET or PETE (polyethylene terephthalate) Polybutadiene Polycarbonate Polyester elastomer Polyethylene Polypropylene Polystyrene (expanded and unexpanded) Polyurethane (expanded and unexpanded) PVC (polyvinyl chloride greater than 15 percent plasticized, e.g., coated fabric unsupported film) SAN (styrene acrylonitrile) SBR (styrene butadiene rubber) 2303.7.2 Group B plastics. Group B plastics are plastic materials having a heat of combustion and a burning rate higher than that of ordinary combustibles, but not as high as those of Group A plastics. Examples of Group B plastics include, but are not limited to, the following: Cellulosics (cellulose acetate, cellulose acetate butyrate, ethyl cellulose) Chioroprene rubber Fluoroplastics (ECFFE, ethylene-chiorotrifluoroethylene copolymer, ETFE, ethylene-tetrafluoroethylene copoly- mer, FEP, fluorinated ethylene-propylene copolymer) 281 Technical Reference 2 13-118 INSTALLATION OF SPRINKLER SYSTEMS 12.3.1.11.3 Where a storage rack, due to its length, requires less than the number of in-rack sprinklers specified, only those in-rack sprinklers in a single rack need to be included in the calculation. 12.3.1.12* Horizontal Barriers and In-Rack Sprinklers. Hori- zontal barriers used in conjunction with in-rack sprinklers to impede vertical fire development shall be constructed of sheet metal, wood, or similar material and shall extend the full length and width of the rack. Barriers shall be fitted within 2 in. (51 mm) horizontally around rack uprights. 12.3.1.13 For Storage Up to and Including 25 ft (7.6 m). In double-row and multiple-row racks without solid shelves, a lon- gitudinal (back-to-back clearance between loads) flue space shall not be required. Nominal 6-in. (152.4-mm) transverse flue spaces between toads and at-rack uprights shall be main- tained in single-row, double-row, and multiple-row racks. Ran- dom variations in the width of flue spaces or in their vertical alignment shall be permitted. (See Section C. 13.) 12.3.1.14 For Storage over 25 ft (7.6 m). 12.3.1.14.1 Nominal 6-in. (152.4-mm) transverse flue spaces between loads and at rack uprights shall be maintained in single-row, double-row, and multiple-row racks. Nominal 6-in. (152.4-mm) longitudinal flue spaces shall be provided in double-row racks. Random variations in the width of the flue spaces or in their vertical alignment shall be permitted. 12.3.1.14.2 In single-row, double-row, or multiple-row racks, a minimum 6-in. (152.4-mm) vertical clear space shall be maintained between the sprinkler deflectors and the top of a tier of storage. Face sprinklers in such racks shall be located a minimum of 3 in. (76 mm) from rack uprights and no more than 18 in. (460 mm) from the aisle face of storage. Longitu- dinal flue in-rack sprinklers shall be located at the intersection with the transverse flue space and with the deflector located at or below the bottom of horizontal load beams or above or below other adjacent horizontal rack members. Such in-rack sprinklers shall be a minimum of 3 in. (76 mm) radially from the side of the rack uprights. 12.3.2 Protection Criteria for Rack Storage of Class! through Class IV Commodities Stored Up to and Including 25 ft (7.6 m) in Height. 12.3.2.1 Control Mode Density-Area Sprinkler Protection Cri- teria for Rack Storage of Class I through Class TV Comniodi- ties Stored Up to and Including 25 ft (7.6 m) in Height. 12.3.2.1.1 The area and density for the hydraulically remote area and the water supply shall be determined as specified in 12.1.10 for storage up to 12 ft (3.7 m) and 12.3.2 for storage over 12 ft (3.7 m). 12.3.2.1.1.1* Ceiling sprinkler water demand shall be deter- mined in accordance with 12.3.2.1.2 for single- and double-row racks or 12.3.2.1.3 for multiple-row racks. (See Section C.14.) 12.3.2.1.2* Single- or double-row racks for Class I, Class II, Class 111, or Class IV commodities, encapsulated or nonencap- sulated in single- or double-row racks, ceiling sprinkler water demand in terms of density (gpm/ft2) (mm/min) and area of sprinkler operation [ft2 (m) of ceiling or roof] shall be se- lected from the density/area curves of Figure 12.3.2.1.2(a) through Figure 12.3.2.1.2(g) that are appropriate for each commodity and configuration as shown in Table 12.3.2.1.2 and shall be modified as appropriate by 12.3.2.1.5. These re- quirements shall apply to portable racks arranged in the same manner as single- or double-row racks. Table 12.3.2.1.2 Single. or Double-Row Racks - Storage Height Up to and Including 25 ft (7.6 m) Without Solid Shelves Ceiling Sprinkler Water Demand With In-Rack Sprinklers Without In-Rack Spriniders Aisles* Sprinklers Apply Commodity Mandatory Apply Figure Figure Height Class Encapsulated ft in In-Rack Figure Curves 12.3.2.1.5.1 Figure Curves 12.3.2.1.5.1 4 1.2 C and D F and H No No 12.3.2.1.2(a) 12.3.2.1.2(a) Yes 8 2.4 A and B E and G 4 1.2 C and D C and H Yes No 12.3.2.1.2(e) 12.3.2.1.2(c) Yes 8 2.4 A and B E and F 4 1.2 C and D G and H No No 12.3.2.1.2(b) 12.3.2.1.2(b) Yes 8 2.4 AandB E and F 11 4 1.2 C and [I C. and H Over 12 ft (3.7 m), tIJ) to and including 20ft Yes No 12.3.2.1.2(c) Yes 12.3.2.1.2(e) Yes 8 2.4 A and B E and F No 4 12 No 12.3.2,1.2(c) CandD 12.3.2.1.2(c) Cand I-I Yes 8 2.4 AandB E and F III 4 1.2 C and D Yes I level 12.3.2.1.2(0 - - 8 2.4 Aand B No 4 1.2 , No 12.3.2.1.2(d) C and D 12.3.2.1.2(d) C and H Yes 8 2.4 A and B E and F Iv 4 1.2 CandD Yes I level I2.3.2.1.2(g) - - - 8 2.4 AandB 2002 Edition STORAGE 13-121 Curve Legend Single-or double-row racks with 8-ft (2.44-rn) aisles with 286°F (141°C) ceiling sprinklers and 165°F (74°C) in-rack sprinklers Srngle-or double-row racks with 8-ft (2.44-rn) aisles with 165°F (74°C) ceiling sprinklers and 165°F (74°C) in-rack sprinklers Single-or double-row racks with 4-ft (1.22-rn) aisles or multiple-row racks with 286°F (141°C) ceiling sprinklers and 165°F (74°C) in-rack sprinklers Single-or double-row racks with 4-ft (122-rn) aisles or multiple-row racks with 165°F (74°C) ceiling sprinklers and 165°F (74°C) in-rack sprinklers Curve Legend Single-or double-row racks with 8-It (2.44-rn) aisles and 286°F (141°C) ceilIng sprinklers Single-or double-row racks with 8-11 (2.44-rn) aisles and 165°F (74°C) ceiling sprinklers 6-Single-or double-row racks with 4-ft (122-rn) aisles and 286°F (141°C) ceiling sprinklers Single-or double-row racks with 4-ft (1 22-m)aisles and 165°F (74°C) ceiling sprinklers Multiple-mw racks with 8-ft (244-rn) or wider aisles and 286°F (141°C) ceiling sprinklers Mulliple-row racks with 8-ft (2.44-rn) or wider aisles and 165°F (74°C) ceiling sprinklers Ceiling sprinkler density (mm/mm) 6.1 82 102 122 14.3 16.3 18 20.4 6000 Ce C ?S 5000 CD Q. 0 4000 x C CL 3000 c 2000 (I, Ce 0 100g1r11 Ill 11_I11_11I1Ir111111 Ill 111t11f1t 0.15 0.20 025 0.30 0.35 0A0 0.45 0.50 Ceiling sprinkler density (gpmfft2) 557 C 465 CD 0. 0 372 C 0. 279 . 0 Ce 0, Ce 186 CD POW • only a .193 FIGURE 12.8.2.1.2(c) Sprinkler System Design Curves - 20-ft (6.1-in) High Rack Storage - Class ifi Nonencapsulated Commodities - Conventional Paliets. Ceiling sprinkler density (mm/mm) E C 0 Ce 0. 0 Ce C 0. Ce 0 Ce Ce Ce C 0, Ce Ce a 020 025 030 0.35 0.40 0.45 0.50 0.55 0.60 Ceiling sprinkler density (gpmF1t2) Curve Legend A - Single-or double-row racks with 8-ft (244-m) aisles with 286°F (141°C) ceiling sprinklers and 165°F (74°C) in-rack sprinklers Single-or double-row racks with 8-ft (2.44-rn) aisles with 185°F (74°C) ceiling sprinklers and 165°F (74°C) in-rack sprinklers Single-or double-row racks with 4-ft (122-rn) aisles or multiple-ow racks with 286°F (141°C) ceiling sprinklers and 165°F (74°C) is-rack sprinklers Single-or double-row racks with 4-ft (I 22-m)aisles or multiple-row racks with 165°F (74°C) ceiling sprinklers and 165°F (74°C) in-rack sprinklers Curve Legend - Single-or double-row racks with 8-ft (2.44-rn) aisles and 286°F (141°C) ceiling sprinklers F- Single-or double-row racks with 8-ft (244-rn) aisles and 165°F (74°C) ceiling sprinklers 6-Single-or double-row racks with 4-ft (1.22-rn) aisles and 286°F (141°C) ceiling sprinklers H- Single-or double-row racks with 441 (122-rn) aisles and 165°F (74°C) ceiling sprinklers FIGURE 12.3.2.1.2(d) Sprinkler System Design Curves - 20-ft (6.1-rn) High Rack Storage - Class N Nonencapsulated Commodities Conventional Pallets. 2002 Edition Technical Reference 3 LI HIGH-PILED COMBUSTIBLE STORAGE An automatic smoke detection system installed in accor- dance with Section 907 and within enclosed carousel storage systems, which sounds a local alarm at the opera- tor's station and stops the carousel storage system upon the activation of a single detector. A single dead-man-type control switch that allows the operation of the carousel storage system only when the operator is present. The switch shall be in the same room as the carousel storage system and located to provide for observation of the carousel system. SECTION 2310 SPECIALTY STORAGE 2310.1 General. Records storage facilities used for the rack or shell storage of combustible paper records greater than 12 feet (3658 mm) in height shall be in accordance with Sections 2306 and 2308 and NFPA 13 and NFPA 230. Palletized storage of records shall be in accordance with Section 2307. TABLE 2308.3 REQUIRED FLUE SPACES FOR RACK STORAGE IN-RACK SPRINKLER AT THE CEILING WITH OR WITHOUT SPRINKLERS AT AUTOMATIC SPRINKLER MINIMUM IN-RACK SPRINKLERS EVERY TIER NONSPRINKLERED RACK PROTECTION :5 25 feet Storage height CONFIGURATION Option 1 Option 2 >25 feet Any height Any height Sizeb 3 inches Not Applicable 3 inches Not Required Not Required Transverse flue Single-row rack space Vertically aligned Not Required Not Applicable Yes Not Applicable Not Required Longitudinal flue space Not Required Not Applicable Not Requiredi Not Required Not Required Sizeb 6 inches' 3 inches 3 inches Not Required Not Required Transverse flue Double-row rack space Vertically aligned Not Required Not Required Yes Not Applicable Not Required Longitudinal flue space Not Required 6 inches 6 inches Not Required Not Required Transverse flue Sizeb 6 inches Not Applicable 6 inches I Not Required Not Required Multi-row rack space Vertically aligned Not Required Not Applicable Yes Not Applicable Not Required Longitudinal flue space I Not Required 1 Not Applicable Not Required Not Required 1 Not Required For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. 1'hree-inch transverse flue spaces shall be provided at least every 10 feet where ESFR sprinkler protection is provided. Random variations are allowed, provided that the configuration does not obstruct water penetration. 2007 CALIFORNIA FIRE CODE 287 C S S Technical Reference 4 S S S S S S S 0 HIGH-PLED COMBUSTIBLE STORAGE TABLE 2306.2 GENERAL FIRE PROTECTION AND LIFE SAFETY REQUIREMENTS SOLID-PILED STORAGE, SHELF ALL STORAGE AREAS STORAGE AND PALLETIZED STORAGE (See Sections 2306,2307 and 2308)b (see Section 2307.3) Automatic fire- Fire Smoke and Draft Maximum SIZE OF HIGH-PILED STORAGE AREAa extinguishing detection Building heat curtains permissible (square feet) system (see system access removal (see Maximum pile storage Maximum COMMODITY (see Sections 2306.2 Section (see Section (see Section (see Section Section dimensloif helghta pile volume CLASS and 2306.4) 2306.4) 2306.5) 2306.6) 23067) 2306.7) (feet) (feet) (cubic feet) 0-500 Not Not Not Not Not Not Not Not Required Required' Required Required" Required Required Required Required 501-2,500 Not Yes' Not Not ' Not 100 40 100,000 Required- _ Requirede Required Required 2,501-12,000 Yes Not Not Not Not 100 40 400,000 Public accessible Required Required" Required Required 2,501-12,000 Not Not Not Not Nonpublic accessible Yes Required Requirede Required Required 100 40 400,000 (Option _1) 14V - 2,501-12,000 Not Nonpublic accessible Required" Yes Yes Yes' Yes' 100 301 200,000 (Option 2) 12,001-20,000 Yes Not Yes Yes' Not 100 40 400,000 Required Required 20,001-500,000 Yes Not Required Yes Yes' Not Required 100 40 400,000 Greater than Yes Not Yes Yes' Not 100 40 400,000 500,000 Required Not Required 0-500 Not Not Not Not 50 Not Not Requireda Required Requirede Required Required Required Required 501-2,500 Yes Not Not Not Not 50 30 75,000 Public accessible Required Requirede Required Required 501-2,500 Not Not Not Not Nonpublic accessible Yes Required Required" Required Required 50 30 75,000 High (Option 1) hazard 501-2,500 Nonpublic accessible Not Required- Yes Yes Yes' Yes' 50 20 50,000 (Option 2) 2,501-300,000 Yes Not Yes Yes1 Not 50 30 75,000 Required Required 300,001-500,0009" Yes Not Yes Yes' Not 50 30 75,000 Required ______ Required For SI: 1 foot = 304.8 mm, 1 cubic foot = 0.02832 ni', 1 square foot = 0.0929 m2. When automatic sprinklers are required for reasons other than those in Chapter 23, the portion of the sprinkler system protecting the high-piled storage area shall be designed and installed in accordance with Sections 2307 and 2308. For aisles, see Section 2306.9. Piles shall be separated by aisles complying with Section 2306.9. For storage in excess of the height indicated, special fire protection shall be provided in accordance with Note g when required by the fire code official. See also Chapters 28 and 34 for special limitations for aerosols and flammable and combustible liquids, respectively. Section 503 shall apply for fire apparatus access. L For storage exceeding 30 feet in height, Option I shall be used. Special fire protection provisions including, but not limited to, fire protection of exposed steel columns; increased sprinkler density; additional in-rack sprinklers, without associated reductions in ceiling sprinkler density; oradditional fire department hoseconnections shall be provided when required by the fire code official. High-piled storage areas shall not exceed 500,000 square feet. A 2-hour fire wall constructed in accordance with the California Building Code shall be used to divide high-piled storage exceeding 500,000 square feet in area. L Not required when an automatic fire-extinguishing system is designed and installed to protect the high-piled storage area in accordance with Sections 2307 and 2308. j. Not required when storage areas are protected by early suppression fast response (ESFR) sprinkler systems installed in accordance with NFPA 13. 284 2007 CALIFORNIA FIRE CODE Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 Telephone (760) 434-7885 Fax (760) 729-1139 September 3, 2008 Carlsbad Fire Department Fire Prevention 1635 Faraday Avenue Carlsbad, CA 92008 Re: Addendum to Fire Code Compliance Report - High-Piled Storage Project: ViaSat, Inc. 6197 El Camino Real Bldg. 6.5 Carlsbad This addendum is submitted as a supplement to the Fire Code Compliance Report dated September 2, 2008. As an option to the proposed 20 ft storage height, ViaSat may want to increase the storage height to 24 ft. The following information represents fire protection requirements for the storage of Class I-TV commodities stored 'to 24 ft in height. Storage Array Proposed Area Used for High-piled Storage: Approx. 1,840 sq. ft. Aisle Width: >8 ft. Type of Rack: Single and Double-Row Type of Shelves in racks: Open, Non-solid shelving Pallet Type: Conventional wooden Storage Height: Up to and including 24 ft. Commodity Class: Class I-TV Warehouse Ceiling Height: Maximum 26 ft. Flue Space Required: 6" transverse or, 3" transverse with 6" longitudinal Existing Ceiling Sprinkler System: .45/3000 Existing Ceiling Sprinkler Spacing: </= 100 sq. ft./head Existing Ceiling Sprinkler Head: ELO-23 lB 11.2 K, 286° Clearance from Storage to Sprinkler Deflector: At least 18 inches XI FIRE PROTECTION AND LIFE-SAFETY REQUIREMENTS (ADDENDUM) High-Piled Rack Storage Fire Protection In oIdIkc \\1I1 NI P \ 1 I lable 1232 12, storage of nonencapsulated Class IV commodities in ingI or douhiL oi' r over 22 ft and up to and including 25 ft with minimum X It Lil,,Ics and 26 LL11111 pnnk1ers must be in accordance with Figuic 12 ' 2 1 2(d), curve A. In addition to LoIllpI\ ing \\lth the ceiling density Fire and Life Safety Consulting Anne Marie Bland P.O. Box 1643 Carlsbad, CA 92018-1643 T (760) 434-7885 F(760) 729-1139 ViaSat Page 2 of 2 (Addendum) of curse A, one level of in-rack sprinklers is requud Nlimmwn ceiling sprinkler density required is 32/2000 Following the cure to 0()() sq It arca results in a required minimum density of 29/3000 The existing dcnii i dequte for the piopod storage In-Rack Fire Sprinklers In-rack sprinklers for Class I-1V commodities in single and double row racks up to 25 ft storage height must be installed per the following: Located on the first tier level at or above one-half of the storage height. Maximum horizontal spacing of 8 ft. Minimum of 6 inches vertical space must be maintained between the in-rack sprinkler deflectors and the top of a tier of storage. Sprinkler discharge shall not be obstructed by horizontal rack members. Demand based on simultaneous operation of the most hydraulically remote 8 sprinklers. Sprinklers shall discharge at not less than 15 psi. Sprinklers shall be ordinary temperature standard or quick response with a nominal K factor of 5.6 or 8.0, pendent or upright. [Technical Reference] Storage-Type Sprinklers (Ceiling) For required densities greater than .20 gpmlsq. ft. and less than .34 gpmlsq. ft., standard response spray sprinklers with a K-factor of 8.0 or larger shall be used. The existing ceiling fire sprinkler K-factor is adequate for the proposed use. If, after reviewing this information, you have any questions or comments, or you are in need of further information, please do not hesitate to contact me. I look forward to working with you to resolve any issues that may arise, and will be awaiting your response. Thank you. Best regards, Anne Marie Bland, CA Certified FPO III Code Consultant * Recommendations are based on information supplied by ViaSat and Coibrese Material Handling. Any discrepancies between actual conditions and information contained in this report will invalidate these recommendations. Verification of compliance with requirements and provisions addressed herein rests with the authority having jurisdiction and is outside the scope of this report. This report is not intended as an engineering analysis but rather a summary of applicable code requirements. Technical Reference STORAGE 13-119 Table 12.3.2.1.2 Conthused Ceffing Spxinkler Water Demand Aisles* With In Rack Spdnklers Without Inilack Spthdders App HeWd Commodity (3am Eaiciqanslated ft as Mrnh.tmy ht.Rath Fsgure Curves ApyFlir 12.3.2.1.5.1 FIgure Curves FW- 2.3.2.13.1 No 4 1.2 No 12.3.2.1.2(a) CandD 123.2.1.2(a) FandH Yes 8 2.4 AandB EandG 1 Yes- 4 1.2 Candl) I level 12.3.2.1.2(e) - - - 8 2.4 AandB No 4 1.2 Candl) GandH U No 12.3.2.1.2(b) 12.311.2(b) Yes 8 2.4 . AandB EandF Yes 4 1.2 CandD Over 20 ft (6.1 as), uptoani including 22ft (6.7m) 1 level 12.3±1.2(e) No - - - 8 2.4 AandB Hi No 4 1.2 No 12.5.2.1.2(c) Candfl 12.3±1.2(c) GandH Yes 8 2.4 AandB EandF Yes 4 1.2 C and D Ilevel 12.3.2.1.2(f) - - - 8 2.4 AandB Iv No 4 1.2 No 12.3.2.1.2(d) CandD 12.3.2.1.2(d) GandH Yes 8 2.4 AandB EandF Yes 4 1.2 CandD Ilevel 12.32.12(g) - - - 8 2.4 AandB • 1 No 4 12 No 12.3.2.1.2(a) Candi) 12.3.2.1.2(a) FandH Yes 8 2.4 AandB EandG Yes 4 1.2 CandD 1 level 12.3.2.1.2(e) - - - 8 2.4 . AandB II No 4 1.2 No 12.3±1.2(b) Candl) 12.5±1.2(b) GandH Yes 8 2.4 AandB EandF Yes •- 4 1.2 Candfl Over 22 ft (6.7 as), upasand including 25 ft (7.6 as) I level 12.3±1.2(e) No - - - 2.4 AandB HI No . 4 1.2 No 12.5.2.1.2(c) Cand D 12.3.2.1.2(c) GandH Yes . 8 2.4 . AandB EandF Yes 4 1.2 C and D Ilevel 12.32-12(f) - - 8 2.4 AandB No 4 1.2 Candfl 12.311.2(d) - - - 8 -2.4 AandB IV ilevel Yes 4 1.2 CandO. - 12.391.2(g) - - - 8 2.4 AandB *See 12.3.2.1.2.1 for interpolation of aisle widths. 2002 Edition 12.3.2.4 In-Rack Sprinklers for Rack Storage of Class I through Class IV Commodities Stored Up to and Including 25 ft (7.6 m) in Height. 12.3.2.4.1 In-Rack Sprinkler Location for Rack Storage of Class I through Class IV Commodities Stored Up to and Including 25 ft (7.6 m) in Height. 12.3.2.4.1.1 In single- or double-row racks without solid shelves, in-rack sprinklers shall be installed in accordance with Table 12.3.2.1.2. 12.3.2.4.1.2 In multiple-row racks no deeper than 16 ft (4.9 m) with aisles 8 ft (2.4 m) or wider, in-rack sprinklers shall be installed in accordance with Table 12.3.2.1.3. 12.3.2.4.1.3 In multiple-row racks deeper than 16 ft (4.9 m) or with aisles less than 8 ft (2.4 m) wide, in-rack sprinklers shall be installed in accordance with Table 12.3.2.1.4. 12.3.2.4.1.4 In-rack sprinklers at one level only for storage up to and including 25 ft (7.6 m) high shall be located at the first tier level at or above one-half of the storage height. 12.3.2.4.1.5 In-rack sprinklers at two levels only for storage up to and including 25 ft (7.6 m) high shall be located at the first tier level at or above one-third and two-thirds of the storage height. 12.3.2.4.2 In-Rack Sprinkler Spacing for Rack Storage of Class I through Class IV Commodities Stored Up to and Including 25 ft (7.6 m) in Height. 12.3.2.4.2.1* Maximum horizontal spacing of in-rack sprinklers in single- or double-row racks with nonencapsulated storage up to and including 25 ft (7.6 m) in height shall be in accordance with Table 12.3.2.4.2.1. For encapsulated storage, maximum horizontal spacing shall be 8 ft (2.44m). Table 12.3.2.4.2.1 In-Rack Sprinkler Spacing for Class I, II, III, and IV Commodities Stored up to 25 ft (7.6 m) in Height Aisle Commodity Class Widths I and II III IV I ft m ft m ft m ft 8 2.4 12 3.7 12 3.7 8 2.4 4 1.2 12 3.7 8 2.4 8 2.4 12.3.2.4.2.2* Maximum horizontal spacing of in-rack sprinklers on branch lines, in multiple-row racks with encapsulated or nonencapsulated storage up to and including 25 ft (7.6 m) in height, shall not exceed 12 ft (3.7 m) for Class I, II, or ifi commodities and 8 ft (2.4 m) for Class IV commodities, with area limitations of 100 ft2 (9.3 m2) per sprinkler for Class I, II, or III commodities and 80 ft2 (7.4 m2) per sprinkler for Class IV commodities. The rack plan Copyright NFPA view shall be considered in determining the area covered by each sprinkler. The aisles shall not be included in area calculations. 12.3.2.4.2.3* The elevation of in-rack sprinkler deflectors with respect to storage shall not be a consideration in single- or double-row rack storage up to and including 20 ft (6.1 m) high. (See Section C. 16.) 12.3.2.4.2.4* In single- or double-row racks without solid shelves with storage over 20 ft (6.1 m) high, or in multiple-row racks, or in single- or double-row racks with solid shelves and storage height up to and including 25 ft (7.6 m), a minimum of 6-in. (152.4-mm) vertical clear space shall be maintained between the in-rack sprinkler deflectors and the top of a tier of storage. Sprinkler discharge shall not be obstructed by horizontal rack members. Copyright NFPA INSTALLATION REQUIREMENTS 13-69 Ceg I Obstruction FIGURE 8.12.5.1.1 Positioning of Sprinklers to Avoid Ob- structions to Discharge (ESFR Sprinkler). Sprinklers shall be installed below isolated noncontinu- ous obstructions that restrict only one sprinkler and are located below the elevation of sprinklers such as light fix- tures and unit heaters. Additional sprinklers shall not be required where the ob- struction is 2 ft (0.6m) or less in width and the sprinkler is located horizontally 1 ft (03 m) or greater from the near- ëst edge of the obstruction. Additional sprinklers shall not be required where sprin- klers are positioned with respect to the bottom of obstruc- tions in accordance with 8.12.5.1. Additional sprinklers shall not be required where the ob- struction is 2 in. (51 mm) or less in width and is located a minimum of 2 ft (0.6 m) below the elevation of the sprin- kler deflector or is positioned a minimum of 1 ft (0.3 m) horizontally from the sprinkler. Sprinklers with a special obstruction allowance shall be installed according to their listing. 8.12.5.3 Continuous Obstructions Below the Sprinklers. 8.12.5.3.1 General Continuous Obstructions. Sprinklers shall be arranged with respect to obstructions in accordance with one of the following: Sprinklers shall be installed below continuous obstruc- tions or they shall be arranged to comply with Table 8.12.5.1.1 for horizontal obstructions entirely below the elevation of sprinklers that restrict sprinkler discharge pattern for two or more adjacent sprinklers such as ducts, lights, pipes, and conveyors. Additional sprinklers shall not be required where the ob- struction is 2 in. (51 mm) or less in width and is located a minimum of 2 ft (0.6 m) below the elevation of the sprin- kler deflector or is positioned a minimum of 1 ft (0.3 m) horizontally from the sprinkler. Additional sprinklers shall not be required where the ob- struction is 1 ft (0.3 m) or less in width and located a minimum of 1 ft (0.3 m) horizontally from the sprinkler. Additional sprinklers shall not be required where the ob- struction is 2 ft (0.6 m) or less in width and located a minimum of 2 ft (0.6 m) horizontally from the sprinkler. Ceiling sprinklers shall not be required to comply with Table 8.12.5.1.1 where a row of sprinklers is installed un- der the obstruction. 8.12.5-3.2 Upright Sprinklers. 8.12.5.3.2.1 Upright sprinklers shall be installed on sprigs arranged so that the deflector is a minimum of 7 in. (178 mm) above the top of the sprinkler pipe. 8.12.5.3.2.2 K-11.2 upright sprinklers shall be permitted to be installed on sprigs arranged so that the deflector is a mini- mum of 7 in. (178 mm) above the top of the sprinkler pipe. 8.12.5.3.3 Bottom Chords of Bar Joists or Open Trusses. ESFR sprinklers shall be positioned a minimum of 1 ft (0.3 m) horizontally from the nearest edge to any bottom chord of a bar joist or open truss. 8.12.5.3.4 Open Gratings. Sprinklers installed under open gratings shall be of the intermediate level/rack storage type or otherwise shielded from the discharge of overhead sprinklers. 8.12.5.3.5 Overhead Doors. Quick response spray sprinklers shall be permitted to be utilized under overhead doors. 8.12.5.3.6 Special Obstruction Allowance. Sprinklers with a special obstruction allowance shall be installed according to their listing. 8.12.6 Clearance to Storage (Early Suppression Fast- Response Sprinklers). The clearance between the deflector and the top of storage shall be 36 in. (914 mm) or greater. 8.13 In-Rack Sprinklers. 8.13.1 System Size. The area protected by a single system of sprinklers in racks shall not exceed 40,000 ft2 (3716 m2) of floor area occupied by the racks, including aisles, regardless of the number of levels of in-rack sprinklers. 8.13.2 Type of In-Rack Sprinklers. 8.13.2.1 Sprinklers in racks shall be ordinary-temperature standard-response or quick-response classification with a nominal K-lltctor of 5.6 or 8.0, pendent or upright. 8.13.2.2 Sprinklers with intermediate- and high-temperature ratings shall be used near heat sources as required by 8.3.2. 8.13.3 In-Rack Sprinkler Water Shields. 8.13.3.1 In-Rack Sprinkler Water Shields for Storage of Class I through W Commodities. Water shields shall be provided di- rectly above in-rack sprinklers, or listed intermediate level/rack storage sprinklers shall be used where there is more than one level, if not shielded by horizontal barriers. (See Seclion C.i) 8.13.3.2 In-Rack Sprinkler Water Shields for Plastic Storage. Where in-rack sprinklers are not shielded by horizontal barn- ers, water shields shall be provided above the sprinklers, or listed intermediate level/rack storage sprinklers shall be used. 8.13.4 Location, Position, and Spacing of In-Rack Sprinklers. See Section 12.3. 8.13.5 Obstructions to In-Rack Sprinkler Discharge. In-rack sprinklers shall not be required to meet the obstruction crite- ria and clearance from storage requirements of Section 8.5. 8.14 Special Situations. 8.14.1 Concealed Spaces. 8.14.1.1 Concealed Spaces Requiring Sprinkler Protection. All concealed spaces enclosed wholly or partly by exposed combustible construction shall be protected by sprinklers ex- cept in concealed spaces where sprinklers are not required to be installed by 8.14.1.2.1 through 8.14.1.2.15. 2002 Edition