were tested at ICC-IAS accredited Washington State University. The
testing was performed following the methods used which established the deck
ledger connection provisions in Table R502.2.2.1 of the 2009 International
Residential Code (IRC). The prescriptive IRC table is a valuable guide for
ledger connections, but it is restricted to the test configurations that were
used to develop to table. The IRC table does not prohibit other designs, as
indicated in R502.2.2.2 Alternate deck ledger connections. Deck ledger
connections not conforming to table R502.2.2.1 shall be designed in accordance
with accepted engineering practice....
Our testing expanded on the IRC table.
The five test configurations included our original 5/8 thick Deck2wall Spacer,
5/8 nominal sheathing, 1/2 and 5/8 diameter lag screws, 1/2 and 5/8
diameter bolts, and one configuration with our 1/2 thick SWS spacer, 5/8
sheathing and a structural wood screw that is specified in the table. The
fastener spacing shown in our tables indicates the remarkable performance of the
Deck2wall Spacers as outlined in the report.
See the test report and fastening tables below:
Spacer Testing Report.