Cutting Trusses For Attic Stairs

This would require cutting some of the ceiling joist.

Cutting trusses for attic stairs.

My recommendation is really simple. Head off the truss to the others with double 2x10 as normally done for the floor load and sheeth the floor. Looking to take advantage of some open space in our attic and want to install an attic ladder. Don t modify cut wood trusses.

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. Never cut any structural member of a truss. Home owners sometimes will cut trusses to make more storage space in the attic or to do other modifications or remodeling. If you really want to modify the framing of your attic and roof then consult with a licensed professional structural engineer.

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. Replacement of these furnaces can be difficult and sometimes cannot be done without cutting or modifying a truss. 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.

If you live in a house with engineered manufactured trusses then don t mess with them. Furnaces are often located in attic areas. 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. This is done to hold the bottom chord from pushing the wall out.

Cutting roof trusses is possible but a structural engineer must design the plan for the truss modification to prevent roof collapse. I wouldn t cut any trusses especially the bottom chord under tension holding the outside walls from spreading and the truss together. 1 can the joist be cut to make room for the attic ladder. 2 how much weight could the ceiling joist hold.