Cantilever Steel Deck Framing

Build a freestanding cantilevered deck supported by parallel beams.

Cantilever steel deck framing.

But you ll notice when you look at the portion of the span table for joists with cantilevers that the joist span for decks with a cantilever is often less than the span for the same sized joist without cantilevers. Around alabama where eht is headquartered most decks are connected to the side of a house with a ledger board fastened to the rim joist of the house. Trex elevations is a revolutionary steel framing system that provides a long lasting non combustible ultra reliable foundation for your deck boards. While it will be years before the 2015 version is widely adopted by local codes many building officials often accept future provisions like these as easy to approve alternatives to costly engineering.

This framing style is called post and beam and the overhang is a cantilever. When this system of connections is made properly loads are transferred. Interior grade steel framing triple coated for superior durability. Deck builders and building officials occasionally react to this by asking why g90 is okay for framing while g185 1 85 ounces of zinc per square foot is required for framing hardware.

Cantilevered deck frame instead of a girder at the end of the joists you ll need to put a beam under the joists so they can extend past that support. This simple trex elevations system is made up of three main components which install similar to traditional wood framing yet have better visual appeal and amazing long term staying power. Once installed it acts as a guide for a deck frame that s level and square. It s a good idea to mark joist locations on the ledger and on the front facing rim joist before installation when you can lay the framing members side by side on a pair of sawhorses.

With the allowable cantilever of the joists this beam would support a deck 12 feet by 17 1 2 feet. Lgs framing for decks is typically galvanized to the g90 standard 0 9 ounces of zinc coating per square foot of steel sheet. Deck joist cantilever rules and limits the distance your joists can safely cantilever or overhang a drop beam is determined by the size of the joists the wood type and grade of the lumber and the spacing between joists. The single most important framing member is the ledger board.

Section r507 5 notes that deck joists can cantilever up to 1 4 of the joist span.