Suspending Roof Rafters

Cut a piece of flashing with the tin snips at least 2 inches larger than the damage.

Suspending roof rafters.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. Rafter slope tie spacing inches roof span feet 12 20 28 36 required number of 16d common nails per connection 3 12 12 4 6 8 10 16 5 7 10 13 24 7 11 15 19 32 10 14. This doesn t really address the op s question but the system pictured does look pretty flimsy. One proposes suspending the new furnace from the rafters.

All connections of rafters ridge board and ties were nailed. This is a much more robust method. Patch large holes or rotted areas temporarily with pieces of metal roof flashing. The roof rafters provide integral structural support to the roof.

Allowable spans for joists and rafters 1 7 lumber grade floor joists ceiling joists 5 rafter ceiling joist combination rafter ceiling joist combination rafters 6 douglas fir. Both camps claim that their installation method will reduce noise into the house. In this roof sag removal project because we are pushing the existing rafters apart using a horizontal force of a spreader device in the attic when we nail a new mid span rafter tie in place the older sagged rafters will want to go back to their old comfortably saggy position. The rafters were tied at every other pair at the top and near the springing the point where an arch or roof rises with a vertical hanging tension member between the two all ties and tension members of 2 inch by 4 inch ungraded lumber fastened with 16d nails.

The hvac installs i generally see have the airhandlers suspended on all thread bolted to the rafters and connected to two pieces of unistrut as a saddle. System sits on rubber cork vibration isolators. Screw the flashing to the.