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2006 International Residential Code (IRC)
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| DeckLok transfers the load from the joist of the deck (a structural element) to the joist of the house (also a structural element) by connecting the deck to the floor joist system to form one unit. |
“Where supported by attachment to an exterior wall, decks shall be positively anchored to the primary structure and designed for both vertical and lateral loads as applicable. Such attachment shall not be accomplished by the use of toenails or nails subject to withdrawal.”
DeckLok adds 4,000lbs of lateral resistance per set of DeckLok Brackets along the ledger board.
The lateral load connection required by section R502.2.2 shall be permitted to be in accordance with figure R502.2.2. Hold-down tension devices shall be provided in not less than two locations per deck, and each device shall have an allowable stress design capacity of not less than 1500 lbs.
"Commenter’s Reason: This comment responds to the issue of band joist anchorage raised in the code development committee comments. Deck failures do occur were the deck is attached to the rim joist for lateral loads, but the rim joist is not adequately anchored into the floor system. Positive anchorage of the deck joists to the floor framing addresses this potential failure. The figure is based on a similar figure from FEMA 232."
“Buildings and structures, and all parts thereof, shall be constructed to safely support all loads, including dead loads, live loads, roof loads, flood loads, snow loads, wind loads and seismic loads as prescribed by this code. The construction of buildings and structures in accordance with the provisions of this code shall result in a system that provides a complete load path that meets all requirements for the transfer of all loads from their point of origin through the load-resisting elements to the foundation. Buildings and structures constructed as prescribed by this code are deemed to comply with the requirements of this section.”
DeckLok Brackets placed three feet from each end of the deck, then every 6-8 feet along the rest of the ledger will easily and effectively transfer loads to the foundation of the home.
IRC Tables R301.4 and R301.5 state “…define the minimum concentrated live load for guardrails and handrail as 200 pounds of force (lbf)”. International Building Code (IBC) Section 1714 per IBC Section 1712.1, the “structural unit and connections” shall be tested as indicated in section 1714. Section 1714 utilizes a safety factor of 2.5, a number that has been in the model codes for decades for testing structural assemblies.
Therefore each guardrail design must successfully withstand a load of 500 lbf (200lbf x 2.5 = 500lbf), applied at the top in any direction, to be considered as a code compliant assembly. DeckLok easily meets and/or exceeds this requirement since DeckLok has been tested to withstand up to 1,100 pounds of force with treated hem-fir and 2,000 pounds of force with southern yellow pine.
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