Why would you use a double floor joist.
Triple joist timber floor definition.
But larger is not always better when builders are constructing a home or adding a room addition.
This is the simplest type of timber floor used for residential buildings where spans are short or moderate say up to 4 m and loads are comparatively lighter.
Double and triple joist hangers.
Framed or triple joists timber floors.
Single joist timber floors.
The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example.
Most floor joists consist of 2 by 6 inch lumber but they can use 2 by 8 or 2 by 10 as well which will require longer joist hangers.
The main reason for doubling up floor joists is to double the strength of a single floor joist.
In these cases the joist hangers will be 4.
Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor.
The floor consists of wooden joists also called bridging joists spaced 30 to 40 cm apart and supported on end walls.
Double floor joists are two joists side by side that are usually nailed or screwed together along the length.
This allows you to install a supporting post off the double floor joist to hold a second storey or a.