Area-Divider-Model.pdf
PDF 138 KB Posted
- Solicitation number
- RFP MNA 260000002642 1
- Issued by
- Wayne County, Michigan
About this file
This is a technical drawing specification document, specifically a roofing detail schematic (Drawing No. 01) that illustrates the construction methodology for built-up roofing (BUR) installation with hot/cold base flashing and area divider components. The drawing provides detailed specifications for a roof assembly system that includes wood nailers secured to the deck at 8-inch on-center intervals, specified insulation layers, flexible impervious membrane adhered to the roof deck, and two-ply flashing stripping. The design incorporates wood blocking to promote drainage on both sides, fastened with appropriate fasteners in two rows staggered at 24-inch on-center spacing. A wood cant is nailed to blocking in two staggered rows at 12-inch on-center intervals, with vertical wood blocking (one required, one optional based on field conditions) offset by 18 inches when both are used. The assembly is completed with a new metal cap sloped toward the roof and gravel surfacing membrane.
The specification drawing indicates minimum clearance requirements of 8 inches and 4 inches at designated points and uses neoprene gasketed membrane fasteners at 18-inch on-center spacing. The drawing is presented at a not-to-scale (NTS) format and was created using 2023 AutoCAD software. This technical document serves as construction guidance for roofing contractors and ensures standardized installation procedures for the roofing system components, materials, and fastening methodologies specified in the project.
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Text version
DWG NO. 01
BUILT-UP ROOFING
HOT/COLD BASE FLASHING
AREA DIVIDER
WOOD NAILER SECURED TO DECK
CHAMFER ONE
SIDE OF WOOD
FASTENERS 8'' O.C.
SPECIFIED BUR
SPECIFIED INSULATION
FLEXIBLE IMPERVIOUS
FASTEN 18'' O.C. w/
NEOPRENE GASKETED
MEMBRANE ADHERED TO
SEAL
ROOF DECK
WOOD BLOCKING
TO PROMOTE DRAINAGE
BOTH SIDES
FASTENERS BOTH SIDES
WITH APPROPRIATE FASTENERS
2 ROWS STAGGERED EACH ROW 24'' O.C.
AS SPECIFIED
SPECIFIED BASE
TWO-PLY
FLASHING
NAIL WOOD CANT TO
BLOCKING, 2 ROWS
STAGGERED EACH
ROW 12'' O.C.
STRIPPING
VERTICAL WOOD BLOCKING ONE REQUIRED
SECOND IS OPTIONAL BASED ON FIELD
CONDITIONS. WHEN SECOND VERTICAL BLOCKING
IS USED IT SHALL BE OFFSET FROM THE OTHER BY
18-INCHES.
NEW METAL CAP SLOPED
TOWARD ROOF
GRAVEL
SURFACING
MEMBRANE
SHEET TITLE:
DRAWING No.:
SCALE:
NTS
AutoCAD SHX Text
8'' MIN.
AutoCAD SHX Text
4'' MIN.
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