Structural Timber Floor Joists

A joist is a horizontal structural member used in framing to span an open space often between beams that subsequently transfer loads to vertical members.

Structural timber floor joists.

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. 1 psf lb f ft 2 47 88 n m 2. Some of those options include laminated veneer and strand lumbers i joist and rim boards. True floor joist span calculations can only be made by a structural engineer or contractor.

The picture below shows what the framing for this floor would look like in a three dimensional perspective. Sheet materials mdf hardboard chipboard osb plywood door blanks. Living room how to make a d i y. The floor joists are still 12 long but now you can see a floor beam running horizontally across the middle of the house supported by the lower concrete foundation wall.

This lumber is for applications where high strength values are required such as floor joists rafters headers small beams trusses and general framing. I joists are comprised of top and bottom flanges which resist bending united with webs which provide outstanding shear resistance. 02 41 laundry how to install a laundry chute we show you how to install a laundry chute in your laundry. Dead load weight of structure and fixed loads 10 lbs ft 2.

Structural joists and planks grades are produced in sizes 2x5 up to 4x18. Live load 30 lbs ft 2 1436 n m 2. Sawn carcassing timber cls studwork timber carcassing timber batten fencing timber joists. Modern timber sofa lounge learn how to create this stylish modern sofa by repurposing timber kitchen benchtops.

Maximum floor joist span for no. Live load is weight of furniture wind snow and more. 2 grade of douglas fir are indicated below. If you re concerned about the structural integrity of sagging cracked or twisted joists in your house first call in a structural engineer to inspect the floor and recommend strengthening measures that ll take out the sags and bring the framing up to code search online or for engineers structural in the yellow pages.

Structural joists and planks grades are products that are 5 inches or greater in width. 1 in 25 4 mm. When incorporated into a floor framing system joists serve to provide stiffness to the subfloor sheathing allowing it to function as a horizontal diaphragm. We offer roof trusses storage building trusses and frames floor trusses and trusses that are immediately available to pick up at one of our conveniently located plants.

In addition we carry a wide selection of lumber and boards.