More times than not the floor structure of an existing attic is actually a ceiling joist.
Attic joist 2x4 or 2x6.
Please read disclaimer at end of description sorry this is my first video and i do a terrible job explaining but.
Sistering is the process of adding a new joist next to each existing joist.
Standard joist spacing for the installation of attic flooring materials is 16 inches on center oc meaning the distance from the center of one joist to the center of the next joist is 16 inches.
If the attic joists are not adequate one way to strengthen the floor for live loads is to sister the old joists.
I d like to double my ceiling joists to make my attic space easier to work in for electrical plumbing and for lightweight storage.
Each joist is strong enough to support my weight 175lbs concentrated in a 1 segment of the joist and.
Typically ceiling joists are 2 6 or 2 8.
Get free shipping on qualified 2x6 joist hangers or buy online pick up in store today in the building materials department.
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.