sd-2011-00085_0005.jpg Significant Changes to the IRC 2009 Edition R502.2.2.1 AND TABLE R502.2.2.1 ® Deck Ledger Connection 127
TABLE R502.2.2.1 Fastener Spacing for a Southern Pine or Hem -Fir Deck Ledger and a 2 -Inch Nominal
Solid -Sawn Spruce- Pine -Fir Sand Joist I
(Deck Live Load= 40 psf, Deck Dead Load= 10 psf)
oist S an 6' -0" and 6' -1" to 8' -1" to 10' -1" to 12' -1" to 14' -1" to 16' -1" to
Less 8' -0" 10' -0" 12' -0" 14' -0" 16' -0"
Connection Details On- Center Spacing of Fasteners ee
1 /z "- diameter lag screw with 30 23 18 15 13 11 10
15/32" maximum sheathing
1 /z "- diameter bolt with 15/32" 36 36 34 29 24 21 19
maximum sheathing
lh "- diameter bolt with 15/32" 36 36 29 24 21 18 16
maximum sheathing and 1 /z" — — — — —
stacked washers hh
For SI: 1 inch = 25.4.1 foot = 304.8 mm. 1 pound per square foot = 0.0479 kPa.
A. The tip of the lag screw shall fully extend beyond the inside face of the band joist.
b. The maximum gap between the face of the ledger board and face of the wall sheathing shall be 1 h."
c. Ledgers shall be flashed to prevent water from contacting the house band joist.
A. Lag screws and bolts shall be staggered in accordance with Section R502.2.2.1.1.
e. Deck ledger shall be minimum 2 X 8 pressure- preservative - treated No. 2 grade lumber or other approved materials as established by standard
engineering practice.
L When solid -sawn pressure - preservative- treated deck ledgers are attached to a minimum 1 inch thick engineered wood product (structural
composite lumber, laminated veneer lumber, or wood structural panel band joist), the ledger attachment shall be designed in accordance with
accepted engineering rap ctice.
S. A minimum 1 by 9 1 h Douglas Fir laminated veneer lumber rimboard shall be permitted in lieu of the 2 -inch nominal band joist
I Wood structural panel sheathing, gypsum board sheathing or foam sheathing not exceeding 1 inch in thickness shall be permitted The maxi-
mum distance between the face of the ledger board and the face of the band joist shall be 14nch.
i
RS02.2.2.1.1 Placement of Lag Screws or Bolts in Deck
Ledgers. The lag screws or bolts shall be placed 2 inches (51 mm) in
from the bottom or top of the deck ledgers and between 2 and 5 inches
(51 and 127 mm) in from the ends. The lag _screws or bolts shall be
staggered from the top to the bottom along the horizontal run of the
deck ledger.
i
RS02.2.2.2 Alternate Deck Ledger Connections Deck ledger
connections not conforming to Table R502.2.2.1 shall be designed in
accordance with accepted engineering practice Girders supporting
deck joists shall not be supported on deck ledgers or band joists Deck
ledgers shall not be supported on stone or masonry veneer.
RS02.2.2.3 Deck Lateral Load Connection. The lateral load
connection required by Section R502 2 2 shall be permitted to be in
accordance with Figure R502.2.2.3. Hold -down tension devices shall
be provided in not less than two locations per deck and each de-
vice shall have an allowable stress design capacity of not less than
1500 pounds (6672 N)
CHANGE SIGNIFICANCE: In the 2006 IRC, floor construction must k
be capable of accommodating all loads, and the deck provisions of
Section R502.2.2 require positive connection to the primary strut -
Lure to resist both vertical and lateral loads. Other than those perfor-
mance requirements and the mention that nails subject to withdrawal
were not satisfactory for the connection, the 2006 IRC contained no
R502.2.2.1 and Table R502.2.2.1 continues
i