Forest Grove Wash Facility Rain Screen.pdf
PDF 180 KB Posted
- Attached to
- Forest Grove FMS â? ? Oil / Water Separator
- Solicitation number
- S-24800-00016795
- Issued by
- Washington County, Oregon
About this file
This is a technical specification document for the Forest Grove FMS Wash Facility Rain Screen project in Forest Grove, Oregon. The scope of work involves installing a rain screen on the south side of the existing overhead cover of the wash facility located at 2900 Taylor Way. The project utilizes 2025 Oregon Structural Specialty Code standards with design criteria including 120 MPH wind exposure Category B, Seismic Design Category D, and 20 PSF roof snow load. The installation consists of a 14-gauge 8-inch Zee section with 3½-inch flanges as the primary structural component, supported by a 14-gauge angle at the top connected to an existing Cee section with #12 screws at 24-inch centers, and a bottom support positioned within 6 inches of the bottom edge of the siding. The rain screen features 24-gauge Magna Rib siding with a 2-inch gap at the bottom and spans approximately 23 feet to 26.5 feet in width, with a height of approximately 15 feet as field-verified. Connection details include new Zee sections, support brackets, and through-bolts connecting to existing steel columns and new steel plates for structural integrity.
The document includes comprehensive connection details at 1.5-inch to 1-foot scale and a plan view at quarter-inch to 1-foot scale, showing placement of the Zee sections, Cee end caps, corner trim, and Magna Rib siding along the south wall. The project appears to be part of a broader Forest Grove FMS Oil/Water Separator Installation Project as indicated in the related contract opportunity. No pricing terms, bid deadlines, bidder conferences, or award information is contained within this technical specification document, which serves primarily as the design and installation guide for contractors.
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Text version
FMS WASH FACILITY RAIN SCREEN
2900 TAYLOR WAY
FOREST GROVE, OR
KS MAR 17, 2026
SHEET of 1
THE SCOPE OF WORK CONSISTS OF INSTALLING A RAIN SCREEN ON THE
SOUTH SIDE OF THE EXISTING OVERHEAD COVER OF THE WASH FACILITY.
DESIGN CRITERIA
2025 OREGON STRUCTURAL SPECIALTY CODE
RISK CATEGORY I
WIND 120 MPH EXP B
SEISMIC DESIGN CATEGORY D
ROOF SNOW 20 PSF
LAT - 45.509; LONG -123.095; ELEV ~160 FT
PROJECT SCOPE
3' -7
EQ
S
PA
C
E
14 GAUGE 8" ZEE W/ 3 12"
FLANGES
14 GAUGE ANGLE TOP
SUPPORT TO EXISTING
CEE SECTION.
CONNECT TO CEE #12
SCREW AT 24" O.C.
2" GAP AT BOTTOM
BOTTOM SUPPORT WITHIN
6" OF BOTTOM EDGE OF
SIDING
24 GAUGE MAGNA RIB
SIDING
FI
EL
D V
ER
IF
Y
26'-6"
CROSS SECTION
1/4"=1'-0"
EXISTING STEEL
COLUMN
NEW 10" x 3 12 x 14
GAUGE Z SECTION
NEW SUPPORT BRACKET
NEW 5 8" THRU BOLTS
6"
9"
21 2"
71 2"
16"
TYP
10" CEE END CAP
6"
71 2"
CONNECTION DETAILS
1 1/2" = 1'-0"
CENTER COLUMN END COLUMN
NOTCH ZEE FLANGES
TO FIT INTO CEE
(2) 12" THRU BOLTS EA
FLANGE OF L2x2x1
8 x7"
NEW PL 14" x 6 x 7 14"
NEW PL 14" x 6 x 9"
NEW PL 14" x 7 x 8 12"
PLAN SOUTH WALL
1/4"=1'-0"
23'-6" 23'-6"
23'-0" 23'-0"
10" ZEE10" ZEE
CORNER TRIMMAGNA RIB SIDING
10" CEE
END CAP
FMS WASH FACILITY RAIN SCREEN ADDITION
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