Loft Floor Joists

Clearing the loft area of all debris insulation struts and temporary boards to expose the ceiling boards.

Loft floor 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. True floor joist span calculations can only be made by a structural engineer or contractor. Live load is weight of furniture wind snow and more. Total loft dimensions are 5 2m left to right 7m front to back.

Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors. 2 grade of douglas fir are indicated below. A new floor system is installed using a frame trimmer joists to support the floor joists that span the width of the loft. Loft will be 19 7 1 4 wide by 8 deep.

Dead load weight of structure and fixed loads 10 lbs ft 2. 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. First off basic floor plan of the loft.

1 psf lb f ft 2 47 88 n m 2. This is part 2 in my series of loft conversion videos. 1 ft 0 3048 m. If so what spacing between floor joists do you recommend.

A basic floor system is installed in about 10 stages from preparation to boarding the floor. 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. In this video i show how i cut my my joists make packer plates get the joists from the garden up int. Maximum floor joist span for no.

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. The loft room will also have to be separated by a fire door either at the top or bottom of the new stairs. Joist span and spacing is set by your local building code. I m building a loft above my garage for storage.

Floor joist span tables for surveyors floor construction.