21-040-LAC_Replace-Roofs-Phase1_Final-Drawings_33.pdf
PDF 680 KB Posted
- Attached to
- FPCM-LAC-I001104-M035-RS
- Solicitation number
- 0000036277
- Issued by
- Los Angeles County, California
About this file
The document is a structural drawing sheet (SC201) for a roofing project by the California Department of Corrections and Rehabilitation (CDCR) located at California State Prison, Los Angeles County in Lancaster, CA. The project involves roof replacement for Buildings 346 and 347, with the work focused on Phase 1 of the roof placement, as detailed in the design drawings prepared by Hibser Yamauchi Architects, Inc. The drawing includes a comprehensive roof framing plan, wind pressure plan, and stair cage partial roof plan, with specific notations about construction sequencing, including removing existing roofing, inspecting structural elements, addressing potential concrete or metal deck deterioration, and placing new roofing.
The project specifications include detailed wind uplift value zones (Zone 1: 60 PSF, Zone 2: 75 PSF, Zone 3: 105 PSF) with a safety factor of 2, and precise guidelines for identifying and addressing excessive deterioration in concrete, metal decking, and structural steel. The drawings are dated August 31, 2023, with project number 5843.10 and CDCR job number 21-040, and have received approvals from the State Fire Marshal (approval date 10/10/23) and a structural engineer (stamp dated 9/15/2023). The project involves specific technical details such as reinstalling existing mechanical units, guardrails, access panels, and stair cages, with careful attention to preserving and integrating existing structural elements.
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Text version
7.3
7.3
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A A
B B
C C
D D
E E
F F
G G
H H
J J
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11'-2" 5'-8" 13'-0" 13'-0" 13'-0" 8'-0" 5'-0" 13'-0" 5'-0" 8'-0" 13'-0" 13'-0" 13'-4"
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NOTES:
1. CONSTRUCTION SEQUENCE
A. REMOVE EXISTING ROOFING PER ARCHITECTURAL DRAWINGS.
B. INSPECT EXISTING STRUCTURAL ELEMENTS FOR DETERIORATION.
C. IF CONCRETE SUBSTRATE SHOWS EXCESSIVE DETERIORATION REPAIR
PER 1/S501 OR NOTIFY THE ARCHITECT AND STRUCTURAL ENGINEER
FOR FURTHER DIRECTION. FURTHER REPAIRS TO ANY DETERIORATION OR
SPALLING WILL BE EVALUATED AND DETAILED ON A CASE-BY CASE BASIS
DEPENDING ON THE TYPE AND EXTENT, OR THE REPAIRS NEEDED.
D. PLACE NEW ROOFING PER ARCHITECTURAL DRAWINGS.
2. SEE KEY PLAN 1/SA201 FOR ROOFING WIND UPLIFT VALUES.
3. INDICATES EXTENSION OF (E) PARAPET, SEE
4. EXCESSIVE DETERIORATION:
A. FOR CONCRETE EXCESSIVE DETERIORATION IS DEFINED AS HAVING
SPALLED SECTIONS OF CONCRETE LARGER THAN 3" ACROSS, OR HAVING
CRACKING 1/8" WIDE x 3' LONG OR GREATER.
B. FOR METAL DECKING EXCESSIVE DETERIORATION IS DEFINED AS HAVING
FLAKING RUST WHERE THE REMAINING THICKNESS IS LESS THAN 90% OF
ORIGINAL DECK THICKNESS, OVER AN AREA GREATER THAN 1 SQ FOOT.
C. FOR STRUCTURAL STEEL EXCESSIVE DETERIORATION IS DEFINED AS
HAVING FLAKING RUST WHERE THE REMAINING THICKNESS IS LESS THAN
95% OF ORIGINAL MEMBER THICKNESS.
1. WIND UPLIFT VALUES INCLUDE A SAFETY FACTOR OF 2.
LEGEND:
ZONE 1 - FIELD (60 PSF)
ZONE 2 - PERIMETER (75 PSF)
ZONE 3 - CORNERS (105 PSF)
1 7 11
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ACCESS COMPLIANCE REVIEW
APPROVAL OF THIS PLAN DOES NOT
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SC201
ROOF FRAMING PLAN - BLDG 346 & BLDG 347
0' 4'-0" 8'-0" 16'-0" 32'-0" (1/8" = 1')
346 347
DETAIL
SC201
1/16" = 1'-0"2
WIND PRESSURE PLAN
WIND PRESSURE PLAN SC201
0' 8' 16' 32' 64'
SC201
1/2" = 1'-0"3STAIR CAGE PARTIAL ROOF PLAN
0' 1'-0" 2'-0" 4'-0" 8'-0"
09/15/2023
V1
OFFICE OF THE STATE FIRE MARSHAL
shall be available on the project site at all times.
10/10/23
APPROVED FIRE AND PANIC ONLY
Approval of this plan does not authorize or approve any omission or deviation from applicable regulations. Final approval is subject to field inspection. One set of approved plans
23-0002
11/20/2023 CASp-491 #1317
File details come from the government source that posted it. Updated .