Cutting Trusses For Attic Stairs

Trusses span out to out not out to an inside wall unless engineered that way.

Cutting trusses for attic stairs.

Don t modify cut wood trusses. Before i do can anyone help me answer the following questions. Head off the truss to the others with double 2x10 as normally done for the floor load and sheeth the floor. My recommendation is really simple.

If you really want to modify the framing of your attic and roof then consult with a licensed professional structural engineer. 1 can the joist be cut to make room for the attic ladder. Home owners sometimes will cut trusses to make more storage space in the attic or to do other modifications or remodeling. The building code irc r802 10 4.

This would require cutting some of the ceiling joist. 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. 2 how much weight could the ceiling joist hold.

Replacement of these furnaces can be difficult and sometimes cannot be done without cutting or modifying a truss. If you live in a house with engineered manufactured trusses then don t mess with them. This is done to hold the bottom chord from pushing the wall out. Without the continuous bottom chord you will have two 1 2 trusses though they wouldn t be trusses just triangles.

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. Looking to take advantage of some open space in our attic and want to install an attic ladder. Never cut any structural member of a truss. 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.