This ensures that your trusses or rafters won t move during the installation of your straps.
Space between single wrap strap and roof truss.
For example these 12 lines represent a dozen trusses set.
A single wrap that is not nailed properly gets dropped back to clips level if it has three nails on the front side.
These standards are as follows.
This roof can be lifted up a couple of inches before the strap really becomes effective in holding.
Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches.
Standard roof truss spacing.
Straps should never be bent sideways before attaching to the truss or rafter.
The roof truss spacing standard is important because eighty percent of new homes are built with standard pre fabricated trusses.
Straps single wraps single wraps will wrap over roof truss to the opposing side and require a minimum of 2 nails on the front of the strap and one on the opposing side typically a roofing company is not going to have all the roof decking plywood removed that would allow them to have access to all the locations that need to be retrofitted.
Pitch slope the pitch or slope is the incline of the roof expressed as a fraction describing the rise over the run.
The standard roof truss spacing is 2.
To get your marks for truss layout divide the width of the span by the number of openings you will have between the trusses and not by the number of trusses.
This method is safer and more reliable.
This means that if you re in charge of repairing or installing roofing trusses you ll be expected to hold to these standards.
The rise will be the elevation change over the 12 inches.
For example a slope of 6 12 means for every 12 inches of horizontal distance the slope of the roof will rise 6 inches vertically.
You will also incur additional costs because it is much harder to deck and shingle a roof that is 12 12 pitch versus a 4 12 roof.
Difference in slope between the top and bottom chords is at least 3 12 or the bottom chord pitch is no more than half the top chord pitch.
This is the distance between trusses.
Next is single wraps a strap that goes over the top of the truss rafter and down the other side secured with a minimum of two nails in front and one more on the back of the wrap.
Despite the fact that the photo indicates every truss is strapped this strap between the top of a masonry wall and the truss is a demonstration of a poor installation.
The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases.
Nail each hurricane strap to your truss or rafter with 16 penny framing nails when you install hurricane straps to a roof.
Typical roof truss.
The run or the base number is 12 inches.
