20260819_Revision_5_Asset_Protection_Volume_1_Approved.pdf
PDF 2 MB Posted
- Attached to
- Asset Protection - Painting and Coating
- Solicitation number
- 630-0923-27
- Issued by
- Trinity County, California
About this file
This is a technical design document for the Solano County Downtown Fairfield Justice Campus Asset Protection Project, prepared by Mead & Hunt, Inc. for the County of Solano's Department of General Services – Capital Projects Division. The document contains detailed engineering drawings and specifications for the flap gate and seal assembly (M-502) and flap gate details (M-503), which are components of the broader asset protection initiative designed to protect county properties from seasonal flooding. The flap gate assembly specifications include aluminum construction materials (6061-T6 aluminum, 304/316 stainless steel, or coated A36 carbon steel as directed by the county), with detailed parts lists indicating quantities of components such as top and bottom bars, hinge lugs, clevis pins, cotter pins, and mounting seals. The document was issued for construction on September 29, 2025, with subsequent revisions issued on July 17, 2026, August 11, 2026, and August 19, 2026, addressing requests for information (RFI) related to design modifications.
The technical specifications establish precise dimensional requirements and material standards for all flap gate components, with fasteners and hardware required to be stainless steel Grade 5. The gate assembly is designed to be bolted to mounting brackets using 1/2-13 UNC hex bolts, double flat washers, helical spring lock washers, and heavy hex nuts. The document indicates that flap seals are constructed from 1/4-inch thick EPDM Dura 60 rubber with manufacturer-recommended adhesive applied to secure seals to the gate frame prior to installation. The design accommodates the overall asset protection project scope, which includes barrier walls, berms, landscaping, hardscape, underground utility reconfiguration, and pump systems across multiple county properties on Union Avenue, Clay Street, Delaware Street, and Texas Street in Fairfield, California.
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Text version
10 9
RIGHT VIEW
M-502
ASSEMBLY - FLAP
GATE AND SEAL
DETAILS
CMH
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1943400-190824.01
SEPTEMBER 29, 2026
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SHEET CONTENTS
DO NOT SCALE DRAWINGS
M&H NO.:
DATE:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
ISSUED
These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents.
In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited.
Mead and Hunt, Inc.
180 Promenade Circle, Suite 240 Sacramento, CA 95834 phone: 916-971-3961 meadhunt.com
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VOLUME 1
1 09/29/2025 ISSUED FOR
CONSTRUCTION
2 07/17/2026 RFI 42
3 08/11/2026 RFI 22
4 8/19/2026 RFI 22
NEW FLAP GATE ASSEMBLY1 NTS
PARTS LIST
DESCRIPTION
MATERIAL
L3x2x5/16 X 54" LONG
TOP BAR
6061-T6
ALUMINUM
QTYITEM
L5x3x1/4 X 30" LONG
SIDE BAR
L5x3x1/4 X 54"
BOTTOM BAR
FLAP SEAL SEAT 1/4"
THK PLATE
FLAP SEAL 1/4" THK EPDM DURA
60 RUBBER
GATE LEAF
ASSYMBLY --
7 4 HINGE LUG
8 4 HINGE LUG BUSHING BRONZE
9 2 5/8x2 HEADED
CLEVIS PIN
STAINLESS
STEEL
10 2 1/8"x 1 COTTER PIN
11 2 2 1/2x36x1/4 THK
VERTICAL MOUNTING
SEAL
12 1 1 1/2x48x1/4 THK
HORIZONTAL
MOUNTING SEAL
6061-T6
ALUMINUM
6061-T6
ALUMINUM
6061-T6
ALUMINUM
6061-T6
ALUMINUM
STAINLESS
STEEL
EPDM DURA
60 RUBBER
EPDM DURA
60 RUBBER
TOP VIEW
FRONT VIEW
ISO VIEW
.0
0" 48.00'
2 1/2"
1/
2"
HINGE ARM TYP X2
SEE DETAIL A/M-503
NOTE: APPLY MFG
RECOMMENDED
ADHESIVE TO BACK
SIDE OF SEAL TO
SECURE TO GATE
FRAME PRIOR TO
INSTALLATION.
VERTICAL MOUNTING SEAL HORIZONTAL MOUNTING SEAL11
M-502
M-502
NOTES:
1. GATE LEAF AND FRAME CAN BE CONSTRUCTED USING 6061-T6
ALUMINUM, 304/316 STAINLESS STEEL, OR COATED A36 CARBON
STEEL AS DIRECTED BY COUNTY.
2. FLAP GATE ASSEMBLY TO BE BOLTED TO MOUNTING BRACKETS
(SEE DETAIL 5/S-554) WITH 1/2-13 UNC X 1 3/4 HEX BOLT, DOUBLE
FLAT WASHERS, HELICAL SPRING LOCK WASHER, AND 1/2-13 UNC
HEAVY HEX NUT AT EACH FRAME HOLE. ALL FASTENERS AND
HARDWARE TO BE STAINLESS STEEL GRADE 5.
SEE NOTE 2
FLAP SEAL5
M-502
R50
R1.25
0.75
49.75
.7
8/19/2026
5 8/19/2026 RFI 22
R=0.50
Ø 0.63 THRU
3/16
TYP
BOTH
SIDES
3/16
TYP
3/16
TYP
BOTH
SIDES
HINGE LUG
LUG BUSHING
NOTE: CUT 1/4" FROM THE 2" LEG OF THE L TO REMOVE THE RADIUS
NOTE: CUT 1/4" FROM THE 5" LEG OF THE L TO REMOVE THE RADIUS
FLAP SEAL SEAT
1/4" THICK
M-503
FLAP GATE DETAILS
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1943400-190824.01
SEPTEMBER 29, 2026
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FA
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FI
EL
D
, C A
SHEET CONTENTS
DO NOT SCALE DRAWINGS
M&H NO.:
DATE:
DESIGNED BY:
DRAWN BY:
CHECKED BY:
ISSUED
These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents.
In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited.
Mead and Hunt, Inc.
180 Promenade Circle, Suite 240 Sacramento, CA 95834 phone: 916-971-3961 meadhunt.com
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VOLUME 1
1 09/29/2025 ISSUED FOR
CONSTRUCTION
2 07/17/2026 RFI 42
3 08/11/2026 RFI 22
4 8/19/2026 RFI 22
1.75"
54.00"
3.
3.
4.
54.00"
3.00"
1.00"
16.63" 17.25" 16.63"
1.00"
0.50" 1.25" 9.
.0
0"
.3
8"
48.00"
.8
5"
1.25"
52.75"
36.75"
17.25"
15.13" 14.63"(18.25")
19.00"
1.00" (1.62")
3.00"
50.00"
.0
0"
R=0.50
.0
0"
.0
0"
3/16
TYP
BOTH
SIDES
AND
ENDS
1.75"
4.75"
.0
0"
6°
12.72"
1.75"
R=2.00
R=1.00
R=0.63 Ø0.75096° 0.63"
0.
Ø1.13"
Ø0.625
Ø0.750
+0.005 +0.001
+0.000 -0.003
0.
Ø0.750 +0.000 -0.003
Ø0.625 +0.005 +0.001
GATE FRAME-RIGHT VIEW
ISO VIEW
FRONT VIEW
GATE FRAME - FRONT VIEW
TOP VIEW
HINGE ARM TYP X2
SEE DETAIL A/M-503
GATE LEAF ASSEMBLY
DETAIL B - HINGE ARM BUSHING
HINGE LUG BUSHING
DETAIL A - HINGE ARM DETAIL
L3 X 2 X 5/16 - 54" TOP BAR
L5 X 3 X 1/4 - 54" BOTTOM BAR
L5 X 3 X 1/4 - 30" SIDE BARS
RIGHT SIDE BARLEFT SIDE BAR
3/
4" 4 3/
4"
3/
4"4 3/
4"
M-301
1 1/2"
3/ 4"
3/8" THICK
0.750
R=3/4
HINGE LUG
M-502
M-502
M-502
M-502
M-502
M-502
+0.001 -0.002
+0.001 -0.002
8/19/2026
5 8/19/2026 RFI 22
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