Floor Framing Blocking

Joist spans and spacing are determined by engineering that is published by the manufacturer.

Floor framing blocking. Long spans of joists in newer homes may wobble or bounce from foot traffic. How to make floor joists stronger. Is blocking required for floor joists. Section r502 7 of the 2009 international residential code specifies that joists must be laterally supported by solid blocking that s not less than 2 inches thick and the full depth of.

This framing system can also be used for framing storage shed floors this floor framing system is typical over basements and crawl spaces. Ceiling joists are usually 2 by 6s or sometimes 2 by 4s if it is an older home. Framing a floor using i joists. I needed some blocking or this wall was not going up.

This article teaches you how to build a floor for a house on a concrete foundation. After several centuries of service floor joists in older homes may sag or crack. It s not a building code thing and it s not optional you ll more than likely have to install some blocking to complete your wall framing. Blocking for wall framing are short pieces of 2 by 4 that you install between two joists of the basement ceiling.

However blocking can provide both rigidity and stability to a frame and depending on the size of the joists may even be required by code. A floor s framework is made up mostly of wooden joists that run parallel to one another at regular intervals. Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s. Blocking provides the floor joists with lateral support and it provides a way to transfer shear and vertical loads from the walls above to the foundation below.

Building code requires the use of blocking for floor joists that exceed 2 inches in width by 12 inches in depth.