Loft Floor Joists

True floor joist span calculations can only be made by a structural engineer or contractor.

Loft floor joists.

First off basic floor plan of the loft. I m building a loft above my garage for storage. Maximum floor joist span for no. Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors.

Loft will be 19 7 1 4 wide by 8 deep. Hard lines are the walls on the first floor underneath joists on the first floor landing run left to right so does that mean the central wall running front to back is load bearing. 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 loft room will also have to be separated by a fire door either at the top or bottom of the new stairs.

A basic floor system is installed in about 10 stages from preparation to boarding the floor. What size floor joists should i use 2 x8. A new floor system is installed using a frame trimmer joists to support the floor joists that span the width of the loft. This is part 2 in my series of loft conversion videos.

The new floor joists of your loft conversion will need to offer at least 30 minutes worth of fire protection which could mean replastering the ceilings in those first floor rooms below. 1 ft 0 3048 m. Live load is weight of furniture wind snow and more. In this video i show how i cut my my joists make packer plates get the joists from the garden up int.

1 psf lb f ft 2 47 88 n m 2. If so what spacing between floor joists do you recommend. Clearing the loft area of all debris insulation struts and temporary boards to expose the ceiling boards. Floor joist span tables for surveyors floor construction.

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. Can i get floor joists that will span almost 20 without using column support. Dead load weight of structure and fixed loads 10 lbs ft 2. Joist span and spacing is set by your local building code.

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.