Use a t brace to support the truss vertically.
Brace attic trusses.
The remainder of the trusses should.
Without bracing it is almost impossible to install trusses.
Start several trusses in.
Nail these temporarily to the outside edges of the rafter sides starting with the third truss.
Truss stability bracing this is permanent bracing which holds the trusses upright straight and prevents any out of plane buckling of the members.
Once the roof trusses are stacked into a place they can be positioned one at a time.
Then work away from the braced end filling in the open 8 to 12 ft.
Install 2x4s at a 45 degree angle.
Purlins 24 oc are typical along with the bottom bracing shown.
Bracing the second gable end is advisable.
Alternatively start the first truss 8 to 12 ft.
Cut the ends to the same angle you used for the pony wall studs.
Cut any diagonal braces in the truss with a reciprocating saw.
Use 1 by 4 inch boards called purlins as temporary braces for rafter trusses.
Nail them to the rafters and angle nail the center support to the top edge of the horizontal brace.
Section last after permanently bracing the rest of the trusses.
Truss clusters for maximum strength this image shows a cluster of three trusses tied together.
This is done by plumbing the truss and securing as described above for the first gable end.
Cut a 2 by 4 to fit horizontally from rafter to rafter on each truss.
Use a hammer to knock the bottom end loose.
The help of a second or third person is necessary even to lift a truss onto a single story roof.
It is best to brace the inside of the trusses before handling them.
To strengthen the roof system truss clustering cross bracing and wind bracing is recommended at both end of the buildings and every 20 for longer span buildings.
Some bracing provides a way to put up the trusses evenly while holding them and other bracing supports them after they are put up.
See product data sheet no 3 for more information.
Brace other rafters as they are installed down the roof by nailing temporary 2 by 4 supports to rafter edges and to roof joists if rafters are being installed separately.
Begin with the second gable end truss and work back towards the first gable end.
Step 2 lift trusses onto roof.
In from the gable end and brace it to the deck.
Temporary bracing this is used to restrain the trusses during erection.