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// CODE SNIPPET

R507.9 Vertical and Lateral Supports at Band Joist

Residential Code 2018 of Kansas > 5 Floors > R507 Exterior Decks > R507.9 Vertical and Lateral Supports at Band Joist
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Vertical and lateral supports for decks shall comply with this section.

R507.9.1 Vertical Supports

Vertical loads shall be transferred to band joists with ledgers in accordance with this section.

R507.9.1.1 Ledger Details

Deck ledgers shall be a minimum 2-inch by 8-inch (51 mm by 203 mm) nominal, pressure-preservative-treated Southern pine, incised pressure-preservative-treated hem-fir, or approved, naturally durable, No. 2 grade or better lumber. Deck ledgers shall not support concentrated loads from beams or girders. Deck ledgers shall not be supported on stone or masonry veneer.

R507.9.1.2 Band Joist Details

Band joists supporting a ledger shall be a minimum 2-inch-nominal (51 mm), solid-sawn, spruce-pine-fir or better lumber or a minimum 1-inch by 91/2-inch (25 mm × 241 mm) dimensional, Douglas fir or better, laminated veneer lumber. Band joists shall bear fully on the primary structure capable of supporting all required loads.

R507.9.1.3 Ledger to Band Joist Details

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).

TABLE R507.9.1.3(1)

DECK LEDGER CONNECTION TO BAND JOISTa, b(Deck live load = 40 psf, deck dead load = 10 psf, snow load ≤ 40 psf)

CONNECTION DETAILSJOIST SPAN
6' and less6'1" 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
30231815131110
1/2-inch diameter bolt with 1/2-inch maximum
sheathingd
36363429242119
1/2-inch diameter bolt with 1-inch maximum
sheathinge
36362924211816

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.

  1. Ledgers shall be flashed in accordance with Section R703.4 to prevent water from contacting the house band joist.
  2. Snow load shall not be assumed to act concurrently with live load.
  3. The tip of the lag screw shall fully extend beyond the inside face of the band joist.
  4. Sheathing shall be wood structural panel or solid sawn lumber.
  5. 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.

TABLE R507.9.1.3(2)

PLACEMENT OF LAG SCREWS AND BOLTS IN DECK LEDGERS AND BAND JOISTS

MINIMUM END AND EDGE DISTANCES AND SPACING BETWEEN ROWS
TOP EDGEBOTTOM EDGEENDSROW SPACING
Ledgera2 inchesd3/4 inch2 inchesb15/8 inchesb
Band Joistc3/4 inch2 inches2 inchesb15/8 inchesb

For SI: 1 inch = 25.4 mm.

  1. 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).
  2. Maximum 5 inches.
  3. For engineered rim joists, the manufacturer's recommendations shall govern.
  4. 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.

FIGURE R507.9.1.3(1)

PLACEMENT OF LAG SCREWS AND BOLTS IN LEDGERS

For SI: 1 inch = 25.4 mm.

FIGURE R507.9.1.3(2)

PLACEMENT OF LAG SCREWS AND BOLTS IN BAND JOISTS

R507.9.1.4 Alternate Ledger Details

Alternate framing configurations supporting a ledger constructed to meet the load requirements of Section R301.5 shall be permitted.

R507.9.2 Lateral Connection

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.

FIGURE R507.9.2(1)

DECK ATTACHMENT FOR LATERAL LOADS

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.

FIGURE R507.9.2(2)

DECK ATTACHMENT FOR LATERAL LOADS

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