R507.9 Vertical and Lateral Supports at Band Joist
Fasteners used in deck ledger connections in accordance with Table R507.9.1.3(1) shall be hot-dipped galvanized or stainless steel and shall be installed in accordance with Table R507.9.1.3(2) and Figures R507.9.1.3(1) and R507.9.1.3(2).
DECK LEDGER CONNECTION TO BAND JOISTa, b(Deck live load = 40 psf, deck dead load = 10 psf, snow load ≤ 40 psf)
| CONNECTION DETAILS | JOIST SPAN | ||||||
| 6' and less | 6'1" to 8' | 8'1" to 10' | 10'1" to 12' | 12'1" to 14' | 14'1" to 16' | 16'1" to 18' | |
| On-center spacing of fasteners | |||||||
| 1/2-inch diameter lag screw with 1/2-inch maximum sheathingc, d | 30 | 23 | 18 | 15 | 13 | 11 | 10 |
| 1/2-inch diameter bolt with 1/2-inch maximum sheathingd | 36 | 36 | 34 | 29 | 24 | 21 | 19 |
| 1/2-inch diameter bolt with 1-inch maximum sheathinge | 36 | 36 | 29 | 24 | 21 | 18 | 16 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.
- Ledgers shall be flashed in accordance with Section R703.4 to prevent water from contacting the house band joist.
- Snow load shall not be assumed to act concurrently with live load.
- The tip of the lag screw shall fully extend beyond the inside face of the band joist.
- Sheathing shall be wood structural panel or solid sawn lumber.
- Sheathing shall be permitted to be wood structural panel, gypsum board, fiberboard, lumber or foam sheathing. Up to 1/2-inch thickness of stacked washers shall be permitted to substitute for up to 1/2 inch of allowable sheathing thickness where combined with wood structural panel or lumber sheathing.
PLACEMENT OF LAG SCREWS AND BOLTS IN DECK LEDGERS AND BAND JOISTS
| MINIMUM END AND EDGE DISTANCES AND SPACING BETWEEN ROWS | ||||
| TOP EDGE | BOTTOM EDGE | ENDS | ROW SPACING | |
| Ledgera | 2 inchesd | 3/4 inch | 2 inchesb | 15/8 inchesb |
| Band Joistc | 3/4 inch | 2 inches | 2 inchesb | 15/8 inchesb |
For SI: 1 inch = 25.4 mm.
- Lag screws or bolts shall be staggered from the top to the bottom along the horizontal run of the deck ledger in accordance with Figure R507.9.1.3(1).
- Maximum 5 inches.
- For engineered rim joists, the manufacturer's recommendations shall govern.
- The minimum distance from bottom row of lag screws or bolts to the top edge of the ledger shall be in accordance with Figure R507.9.1.3(1).
For SI: 1 inch = 25.4 mm.
PLACEMENT OF LAG SCREWS AND BOLTS IN LEDGERS
For SI: 1 inch = 25.4 mm.
PLACEMENT OF LAG SCREWS AND BOLTS IN BAND JOISTS
Lateral loads shall be transfered to the ground or to a structure capable of transmitting them to the ground. Where the lateral load connection is provided in accordance with Figure R507.9.2(1), hold-down tension devices shall be installed in not less than two locations per deck, within 24 inches (610 mm) of each end of the deck. Each device shall have an allowable stress design capacity of not less than 1,500 pounds (6672 N). Where the lateral load connections are provided in accordance with Figure R507.9.2(2), the hold-down tension devices shall be installed in not less than four locations per deck, and each device shall have an allowable stress design capacity of not less than 750 pounds (3336 N).
For SI: 1 inch = 25.4 mm.
DECK ATTACHMENT FOR LATERAL LOADS
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
DECK ATTACHMENT FOR LATERAL LOADS