21-040-LAC_Replace-Roofs-Phase1_Final-Drawings_23.pdf
PDF 616 KB Posted
- Attached to
- FPCM-LAC-I001104-M035-RS
- Solicitation number
- 0000036277
- Issued by
- Los Angeles County, California
About this file
This is a structural roof framing plan sheet for a California Department of Corrections and Rehabilitation (CDCR) project located at California State Prison, Los Angeles County in Lancaster, CA. The document specifically covers the roof replacement for Building 334, AD SEG 270 Housing Unit, as part of Phase 1 of a roof replacement project. The project is identified with job number 21-040 and was dated August 31, 2023, with design services provided by Hibser Yamauchi Architects, Inc. The sheet (SB201) details the roof framing plan, wind pressure zones, and includes specific construction sequence notes for roof replacement.
The roof replacement plan includes detailed specifications for wind uplift values across three distinct zones: Zone 1 (Field at 60 PSF), Zone 2 (Perimeter at 75 PSF), and Zone 3 (Corners at 105 PSF), with a safety factor of 2. The plan requires careful inspection of existing structural elements, with specific guidelines for identifying and addressing concrete, metal decking, and structural steel deterioration. The document has received approval from the Office of the State Fire Marshal on 10/10/23 with tracking number 23-0002, and includes a professional engineering stamp from M. Todd Thorp (License No. 2990).
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Text version
7.3
7.3
5.7
5.7
1.8
1.8
A A
B B
C C
D D
E E
F F
G G
H H
J J
K K
K.8 K.8
L L
M M
B.4 B.4
134'-2"
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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(E) WF FRMG TYP
(N) GUARDRAIL PER
SEE ARCH PLAN
S501
(N) SCUPPER PER
SEE ARCH PLAN
S501
(N) GUARDRAIL PER
SEE ARCH PLAN
S501
(N) SCUPPER PER
SEE ARCH PLAN
S501
(N) ACCESS
PANEL PER ARCH
RE-INSTALL (E) MECH
UNIT OVER (N) RAISED
CURB, PER
TYP SEE
MECH
RE-INSTALL (E) UNIT
BRACING, TYP SEE MECH
(N) ACCESS PANEL
PER ARCH
(N) SCUPPER PER
SEE ARCH PLAN
S501
REMOVE AND RE-INSTALL
(E) METAL STAIR PER
(E) DRWGS SEE ARCH
REMOVE AND RE-INSTALL
(E) GUN POST PER
(E) DRWGS SEE ARCH
(E) MECH UNIT
TO REMAIN
REMOVE AND REINSTALL
(E) BIRD PROTECTION;
(E) PLATFORM TO REMAIN
RE-INSTALL (E)
STAIR CAGE PER
SEE ARCH PLAN
A
S301
SB201
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NC
W
AL
L
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NC
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D
S301
WALL EXTENSION PER
SEE ARCH PLAN
S501
REMOVE AND REINSTALL
(E) BIRD PROTECTION
PER
S501
S501
1 7 11
A
E
H
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16'-0"
'-0
13'-0"
'-0
'-0
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 21.8
A
B
9'-0" 1'-8" 1'-10"
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F L A T
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S301
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REMOVE AND
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600 Q STREET, SUITE 200
SACRAMENTO, CA 95811
916 443 0303
CALIFORNIA DEPARTMENT OF
CORRECTIONS AND REHABILITATION
ACCESS COMPLIANCE REVIEW
APPROVAL OF THIS PLAN DOES NOT
AUTHORIZE OR APPROVE ANY OMISSION OR
DEVIATION FROM THE APPLICABLE REGULATIONS.
TRACKING NUMBER:___________________
DATE:____________________________
REVIEWER:_________________________
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SSSSBBBB222200001 111
0' 4'-0" 8'-0" 16'-0" 32'-0" (1/8" = 1')
ROOF FRAMING PLAN - BLDG 334 AD SEG 270 HOUSING UNIT
0' 8' 16' 32' 64'
DETAIL
SB201
1/16" = 1'-0"2
WIND PRESSURE PLAN
WIND PRESSURE PLAN SB201
SB201
1/2" = 1'-0"3STAIR CAGE PARTIAL ROOF PLAN
0' 1'-0" 2'-0" 4'-0" 8'-0"
08/24/2023
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
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