2x4 Attic Joists

Simpson strong tie hu galvanized top flange joist hanger for 2x4 nominal lumber model hu24tf 14 61 14.

2x4 attic joists. Free delivery with 45 order. Depending on the existing attic structure a contractor might be able to sister the current joists by attaching new joists of the same dimension beside them. In short no real builder would use 2x4 s as floor joists. If the attic were designed as living space those ceiling joists would become floor joists and be much bigger.

That s a big size and strength difference between the two types of attic joists even if the joist spacing is the same. Joists aren t just sized from strength. Sometimes they have to be deeper than needed to provide room for insulation too. Set your store to see local availability add to cart.

Ceiling joists are typically 2 8 lumber floor joists are usually 2 10 or 2x 12 lumber. You may walk along a plywood pathway and feel a little bounce in the floor and think hey maybe that s ok. The joists running across the attic floor are 2x4 s spaced 16 inches on center running the full 21 feet. The proposed storage area would be in the middle and back part of the house where the center wall would help hold things up a bit and like i wrote before some ties could be made to the overhead roof rafters.

Simpson strong tie sul galvanized joist hanger for 2x4 nominal lumber skewed left model sul24 6 08 6 08. Flooring for dead loads may not be sufficient for live loads the loads created by people and the features of living space. 2x4 s actual size spaced 16 on center running the width of the building uninterrupted with the ends resting on top of the wall top plate. Chances are your attic is composed of 2x4 rafters and floor joists.

In attics built purely for storage purposes you may find 2x6 ceiling joists or in some cases even 2x4 joists. Each joist is strong enough to support my weight 175lbs concentrated in a 1 segment of the joist and there isn t much deflection either. Here are the reasons why you can t or shouldn t convert your attic to living space.