To do this you will need to cut a slot into the existing truss rafter or joist in a u shape to the required length of the threaded steel bars in the new section of timber.
Fixing roof truss wall plate.
Measure and mark the top plate of the walls on either side of your structure running in line with the proposed roof s ridge every 24 inches.
Standard repair detail to pad bottom chord.
Standard repair detail for damaged or missing plates on a gable stud.
Place the truss fix in position on the top plate wall to cover one or two wall plates whichever is required.
Mark the depth on the concrete bit with a piece of tape.
Standard repair detail to pad top chord to match roof plane 2 1 2 minimum mii rep11.
Set out the ceiling.
Stop drilling when the tape reaches the surface of the block.
A ledger is a horizontal board that is attached to the top of the the wall.
Sometimes structural screws are also used for truss repairs.
Fitting roofing wall plates top plates setting out squaring levelling and fixing strapping gable and hip roof wall plates for rafters joists and roof.
This can be done by skew nailing on all form of roof but on trusses or trussed rafters there is a danger of skew nails disturbing the joint or themselves being deflected by the plates or connectors resulting in an ineffective joint.
The new section of timber is now put in place with the threaded steel bars sitting in the slot.
Slot cut out in existing timber.
Squaring and fixing the wall plates to the brickwork.
Place the bottom of the truss onto the wall plate aligning the left edge of the truss with the edge marks placed on the.
Roof truss repair details.
Drive the nail through at an angle beginning the nail 5 cm 2 inches up from the bottom of the truss.
When using nails to joint truss members it is also necessary to use lumber plywood or oriented strand board osb to join the members.
Roof trusses attach to a ledger that is on top of a block wall.
Walls that are constructed of concrete block that need to be covered with a roof will require the use of a ledger.
Step 2 stand the first truss on the end of the wall flush with the outside end of the wall.
It takes many nails to equ al the capacity of a typical connector plate.
Start from the same end on both walls so that the sets of marks are parallel.
Use the wood screws and screw gun to securely attach the new piece to the truss itself.
Hit truss fix teeth into the timber rafter or truss with hammer.
Hit truss fix teeth into top plate with hammer.