Hemlock spruce and redwood have medium bending strength.
Timber floor joist sizes.
Common species used in house framing include.
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.
Western red cedar eastern white pine and ponderosa pine have low bending strength.
Engineered wood products ewp span and size charts for bci joists.
You should check with your local building department for construction requirements in your area.
These tables can help calculate whether floor joists are strong enough to support themselves and the load they carry without the help of any walls underneath.
Joist sizes the wood boards used as floor joists generally range in size from no smaller than 2 by 4 inches to no larger than 2 by 12 inches.
Joist span and spacing is set by your local building code.
Southern yellow pine and douglas fir have high bending strength.