Cantilever Steel Deck Framing

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

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. Deck framing page 16 beam to post page 12 post to concrete page 11 joist to beam page 14 a system of key connections throughout the deck framing also known as a continuous load path is essential to building a safe code compliant deck. 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. When this system of connections is made properly loads are transferred.

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. Once installed it acts as a guide for a deck frame that s level and square. 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. 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.

Trex elevations is a revolutionary steel framing system that provides a long lasting non combustible ultra reliable foundation for your deck boards. The single most important framing member is the ledger board. 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. With the allowable cantilever of the joists this beam would support a deck 12 feet by 17 1 2 feet.

Build a freestanding cantilevered deck supported by parallel beams. 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. When done correctly this is a strong and code compliant method of building. Lgs framing for decks is typically galvanized to the g90 standard 0 9 ounces of zinc coating per square foot of steel sheet.

An unparalleled three layers of protection surround a carbon steel core ensuring each critical joist beam and ledger connection holds up to the elements for decades with a 25 year limited residential warranty to prove it.