Deck Framing

Deck framing is absolutely crucial to the structural integrity of a deck. A deck's framing system essentially has four main components: posts, beams, joists and bracing.

Understanding the basic fundamentals of framing is very important. Be sure to draw up a plan with exact measurements and layout that details each component according to specified building codes before you begin. You may want to draw it without the deck flooring, railings and stairs at the start to help you get the right idea of what the framing on its own looks like.

Decks are built to withstand a certain weight per square foot. Fifty pounds or more per square foot is not uncommon. Span calculations are crucial to ensure the proper weight can be supported. A span is the distance between two supporting elements. Correct spans for each framing component are critical as it determines the span of the parts that support it.

Deck posts are attached to the foundation and stand vertically. The size, height, number and location of the deck posts depend on the size, structure and layout of the deck being built. Pressure treated wood is used for the deck posts.

Deck beams are large and strong pieces of pressure treated wood. Deck beams run horizontally from post to post. Deck beams also assist to support the deck joists. Beams sit on the posts and can be fastened different ways often fastened with specific bolts or with post caps.

Deck joists run vertically. Joists are attached to the beams and function to hold up the deck floors. The size and spacing of the joists will depend on a deck's structural requirements. Rim joists which are the outer joists normally need top grade pressure treated wood.