Cutting Trusses For Attic Stairs

The building code irc r802 10 4.

Cutting trusses for attic stairs.

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. 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. Furnaces are often located in attic areas. 2 how much weight could the ceiling joist hold.

My recommendation is really simple. 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. Before i do can anyone help me answer the following questions. Don t modify cut wood trusses.

Without the continuous bottom chord you will have two 1 2 trusses though they wouldn t be trusses just triangles. 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. 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. 1 can the joist be cut to make room for the attic ladder. Trusses span out to out not out to an inside wall unless engineered that way. Replacement of these furnaces can be difficult and sometimes cannot be done without cutting or modifying a truss.

Head off the truss to the others with double 2x10 as normally done for the floor load and sheeth the floor. 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. 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.