Deck Ledger system consists of extruded aluminum ledger boards and joist hangers. The hangers snap onto the ledger and, once in place, can’t be lifted out (though they can be moved side-to-side until locked in place). Single and double hangers are available. Ledgers are 8 inches wide and 1/8 inch thick, and come in 5-, 6-, 7-, 8-, and 10-foot lengths. They include built-in bubble levels and ship with 66-millimeter LedgerLok fasteners. The system is compatible with lateral hold-downs, but you will need to drill additional holes. Average cost is about $24 per linear foot including the hangers.

SigmaDek, 403/239-4448,

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