Cutting Trusses For Attic Stairs

Any field modification that involves the cutting drilling or relocation of any structural truss member or connector plate shall not be done without the approval of the truss manufacturer or a licensed design professional.

Cutting trusses for attic stairs.

Don t modify cut wood trusses. Head off the truss to the others with double 2x10 as normally done for the floor load and sheeth the floor. If you live in a house with engineered manufactured trusses then don t mess with them. Lay a 4x8 3 4 sheet of plywood on each end of the truss on the bottom chord spanning to the two trusses on each side of the one to be cut.

Cutting roof trusses is possible but a structural engineer must design the plan for the truss modification to prevent roof collapse. 2 how much weight could the ceiling joist hold. If you really want to modify the framing of your attic and roof then consult with a licensed professional structural engineer. Furnaces are often located in attic areas.

I wouldn t cut any trusses especially the bottom chord under tension holding the outside walls from spreading and the truss together. Hello i am working on a project which i am using attic trusses to be used for a living space approximately 32 wide 10 12 pitch spaced 2 o c. I have never built a staircase to attic trusses only drop down stairs but i am planning on leaving one truss out and doubling the ones to ether side to create a 4 opening. The building code irc r802 10 4.

Replacement of these furnaces can be difficult and sometimes cannot be done without cutting or modifying a truss. This would require cutting some of the ceiling joist. Without the continuous bottom chord you will have two 1 2 trusses though they wouldn t be trusses just triangles. Never cut any structural member of a truss.

My recommendation is really simple. Home owners sometimes will cut trusses to make more storage space in the attic or to do other modifications or remodeling. This is done to hold the bottom chord from pushing the wall out. 1 can the joist be cut to make room for the attic ladder.