HomeMy WebLinkAboutCD 2019-0020; PACIFIC RIM; FIRE LANE ACCESS RECOMMENDATIONS FOR CONCRETE SURFACE AREAS; 2020-01-30S
Leighton Consulting, Inc.
A LEIGHTON GROUP COMPANY
C
RIECFVED
FEB 132020
LAND i1EVELC'MENT
N ENu EERING
January 30, 2020
Project No. 12493.001
To: Xenia Hotels & Resort, Inc.
200 S. Orange Ave. Suite 2700
Orlando, FL 32801
Attention: Mr. Stephen Long
Subject: Fire Lane Access Recommendations for Concrete Surface Areas,
Proposed Renovations to the Park Hyatt Aviara Resort, Carlsbad,
California
References: Leighton Consulting, 2020, Geotechnical Investigation Report, Exterior
Renovations, Park Hyatt Aviara Resort Golf Club & Spa, Carlsbad,
California, Project No. 12493.001, dated January 17, 2020.
As background, Leighton Consulting, Inc. (Leighton) has performed a geotechnical
investigation for improvements at the Park Hyatt Aviara Resort Golf Club & Spa (Hyatt
Aviara) in Carlsbad, California (Leighton, 2020). Improvements include new areas of fire
lane access that could be subjected to a 75,000-pound loading.
Based on our investigation and loading requirements above, we recommend that any
concrete surfaces the proposed fire lane should consists of a minimum 6-inch thick
Portland Cement Concrete (PCC) section reinforced with a 6x6x6 welded wire mess
and underlain by at least 7-inch Class 2 Permeable Base section, over a compacted
subgrade. (Note that the bottom of Class 2 Permeable Base section for the PCC
section should be consistent with the adjacent bottom of Class 2 Permeable Base
section for the Grasspave2 section.) The upper 12 inches of subgrade and the Class 2
Permeable material should be compacted to a minimum of 95 percent relative
compaction (ASTM D 1557).
The PCC pavement materials should conform to and be placed in accordance with
Greenbook Specifications. Concrete should be Class 560-13-3250 with a modulus of
3934 Murphy Canyon Road, Suite B205 • San Diego, CA 92123-4425
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12493.001
rupture of at least 600 psi. Regular crack control joints (between 6 and 8 feet on center)
should be provided for PCC pavement to mitigate the potential for adverse cracking.
The findings and conclusions contained within this letter are based on data obtained from
limited number of observations, site visits, soil excavations, samples, and tests. Such
information is, by necessity, incomplete. The nature of many sites is such that differing
soil or geologic conditions can be present within small distances and under varying
climatic conditions. Changes in subsurface conditions can and do occur over time. In
addition, changes made during design development and construction should be reviewed
by Leighton to determine if recommendations are still applicable.
If you have any questions regarding our letter, please do not hesitate to contact this
office. We appreciate this opportunity to be of service.
Respectfully submitted,
LEIGHTON CONSULTING, INC.
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I ENGINEERING ' GEOLPGJST I.
No. 45203
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* Exp.'V30J20 *
1
William D. Olson, RCE 45283 Mike Jensen, CEG 2457
Associate Engineer Associate Geologist
Distribution (1) Digital Copy
2
Leighton