Attic Trusses And Rafter Ties

Hurricane ties offer a strong connection that will provide you with the strongest resistance against uplift.

Attic trusses and rafter ties.

Moving the rafter ties up only 16 inches from the plate the maximum allowed by code increases the tie force from 1 440 pounds to 2 160 pounds. Rafter ties are required by code unless the house is designed so that the walls or a structural ridge beam carries the full load of the roof. Instead of attaching the tie to the rafter you will be attaching it to the bottom chord of the truss. Click to add item 26 spreadweb residential roof truss 5 12 pitch 87 to the compare list compare click to add item 26 spreadweb residential roof truss 5 12 pitch 87 to the compare list add to list click to add item 26 spreadweb residential roof truss 5 12 pitch 87 to your list.

Simpson strong tie 5 2 7 in 18 gauge triple zinc steel rafter tie. In this example when w 960 the tie force tension at the plate when there are rafters 24 inches on center with a 4 12 pitch and a 12 foot span is 1 440 pounds. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams. For pricing and availability.

Installation is the same for trusses as for rafters see above. Simpson strong tie 6 in 18 gauge triple zinc steel rafter tie. Collar ties rafter ties tension beams structural ridge beams. The prescriptive provisions of the building code require rafter ties on each rafter pair and collar ties every 4.

Collar ties are necessary to prevent separation of the roof at the ridge due to wind uplift. Measure the distance between adjacent roof rafters so that you will know the amount of lumber to purchase. For pricing and availability. Rafter ties resist the forces caused by gravity loads that would otherwise cause the roof to pancake and push out the sidewalls.

Check the attic so that you can get a better look at where the roof rafter collar ties will be installed. Some of these can support the roof and prevent ridge sagging and wall spreading. An engineer can design a roof with rafter ties on wider spacings look at the ridge and or wall plate as a beam if doing that.