If the roof truss has a small crack you will be using the two wooden boards to patch it up but if the crack is much more severe you should use the steel plates because they offer much stronger support to the damaged truss.
How to repair roof truss support.
Truss repairs can be quite easy.
If a part of a truss has been cut out then replacing the board or piece cut out is generally not to hard or expensive.
The first thing you need to do is to assess the damage.
Gary weaver president of timber tech texas a manufacturer of roof and floor trusses based in cibolo texas has been crawling around attics doing truss repairs for 38 years.
Trusses come in different lumber widths 2 by 6 or 2 by 8.
If a board is cracked then placing a similar board on each side of the broken one and bolting or nailing the three together may correct the issue.
Types of common truss repairs break damage in members in situations where a member is broken or damaged not at a joint with the exception of splice joints the primary method of repair is to apply scabs to the truss centered on the damage break to transfer the load carried by the original member.
Apply connector plate at a 1 8 inch spacing from the original plate installation so most of the plate is gripping fresh wood.
Inspect and assess the damaged section of timber and determine where it needs to be cut to prop the timber along it s length using suitably sturdy props such as acro props once supported cut off the damaged end leaving only solid un damaged timber now.
The basics of the process are as follows.
How to fix a broken roof truss step 1.
Let the repaired wood truss set for 24 hours in dry conditions to secure the repair.
Cut two pieces of lumber 4.
Refill the holes in the wood truss with wood adhesive and apply a wood scab to patch it.