Stringer On Floor Joist Framing

Ceiling joists are usually 2 by 6s or sometimes 2 by 4s if it is an older home.

Stringer on floor joist framing.

Last summer i helped a carpenter buddy tear out a rotten deck. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction. For upper level decks 2x10 is recommended as the minimum size to use for strong guard post connections. Joist span and spacing is set by your local building code.

When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started. He sees it all the time. For conventional guardrail post installation bolted to the side of the framing larger framing will provide more strength in the rails. Your composite decking manufacturer will have a unique joist span table to help you determine the maximum length based on joist size and spacing.

Deck joists rotting from the top edge down because the deck boards and debris keep them damp for weeks after rain. The stinger joists are nailed on end into the header joist with the header covering the butt of the joists. Some newer homes have manufactured i beam shaped joists. While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length.

The smaller the spacing the longer your joists can span. Use a water management system such as a drip cap or flashing wherever framing meets the home to move moisture away from the home and deck. The distance you choose affects the maximum span or how long your joists can be without compromising the strength of the deck frame. The joists were pressure treated lumber so i was surprised at how badly decayed they were.

Look for high low uneven joists using a tight string line. Joists must be level and in plane for a flat surface. Remove any screws or fasteners that may be protruding from the surface of the joist. True floor joist span calculations can only be made by a structural engineer or contractor.

But my friend wasn t. Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s. Floor stringers run parallel to the direction of the lap joists in the flooring. 2x6 joists should only be used on ground level decks that do not require and will not provide for any guards.