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16'x20' Garage Building Information and Structural Details

Building Information

Garage Dimensions: 16' x 20'

Ceiling Height: 9'-5"

Plate Height: 109 1/8"

Foundation Type: Concrete slab-on-grade with anchor bolts.

Wall Framing: 2x6 studs at 16" O.C. with OSB sheathing.

Roof Framing: Trusses at 24” O.C. with a 6/12 pitch.

Foundation & Structural Details

1. Foundation

Foundation bolts: 5/8" x 10" anchor bolts @ 4' O.C. with 7" embedment.

Footing Depth: Minimum 12" below grade.

Curb/Foundation Wall Clearance: 8" minimum above grade.

Rebar Reinforcement: #4 rebar horizontal @ 18” O.C., 2 continuous bars.

2. Shear Wall Layout

Front Wall (Garage Door Side):

Two Narrow Shear Walls at each side of the 16' opening.

Reinforced with HDU8 or HHDQ8 Hold-Downs.

Minimum 4:1 aspect ratio for shear panel stability.

Side Walls (Left & Right):

Full-length shear walls for lateral stability.

OSB/Plywood Sheathing (7/16” minimum).

8d nails, 4” O.C. on edges, 6” O.C. in the field.

Rear Wall:

Standard plywood shear wall.

3. Roof Framing ( HIP)

Trusses: Spaced 24” O.C.

Ridge Height: 13’-6”

Roof Pitch: 6/12

Sheathing: 7/16” OSB

Hurricane Ties: Simpson H2.5A or equivalent at every truss-to-wall connection.

4. Windows & Doors

Garage Door: 16’ x 8’

Side Entry Door: 3'0" x 6'8" RH Hinged

Windows: Double-glazed, Low-E

5. Insulation Requirements

Walls: R-19 to R-21

Attic: R-40

Floors: R-15 to R-38 (if applicable)

Additional Code Compliance

Seismic & Wind Load: Must comply with Mason County, WA building codes.

GFCI Protection: Required in bathrooms, kitchens, and garage per NEC 2023.

Smoke Detectors: One per room, interconnected with backup battery.

Ventilation: Bath and utility rooms vented to exterior (5 air exchanges per hour).

Tempered Glass: Required for glazing near doors, showers, and stair landings.

This document provides detailed specifications for the construction of a 16'x20' garage ensuring compliance with local building codes and structural stability.

 

16x20mGARAGE HIP ROOF

$500.00 Regular Price
$100.00Sale Price
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