For high wind areas or strong storms a pitch of 4 12 6 12 18 5 26 5 angle is recommended.
Reinforce roof against heavy snow.
Increasing the thickness of your rafters increases your rafters ability to withstand sagging.
Snow and ice can pack on pounds and weigh down the gutter trough.
The ceiling joists not only provide vertical support for the weight of the ceiling as a beam but they also resist the outward horizontal thrust of the rafters at the top of the wall.
Take 2 6x4 as long as your longest stored lumber and cut 2 inch deep grooves in them as wide as your 2x6 is thick every foot or so.
The slant of the roof allows snow to easily slide off with no standing water.
If a snowstorm just dumped about 9 inches of heavy snow on your roof the equation to determine snow load is 9 x 1 25.
For example when rafters support the weight of the roof and the snow they push against the opposing rafters at the ridge board and push thrust outward at the supporting wall figure 1.
A ss grade douglas fir 2 x 4 rafter has a rated span of 8 11.
Ensure ample purlin spacing the appropriate amount of space between purlins depends on the amount of snow you expect.
If you took in the snow load it would be less than that.
With the arrow roof strengthening kit you ll increase the roof strength by up to 50 which will help your shelter withstand heavy snow accumulation.
Snow increases the overall weight of your roof adding to the forces acting on your rafters.
S equals the depth in inches of the snow on your roof and p represents the pounds per square foot your roof is supporting.
Gutters that sag or hang off the side of the roof are at risk of being damaged during winter.
Reinforcing the connections between the rafters and the walls will help prevent your roof from collapsing.
That works out to be 11 25 pounds per square foot.
Arrow roof strengthening kit our roof strengthening kit is easy to install and can be purchased as an added accessory with a new arrow building or bought later and installed in existing buildings.
All of that starts with the structure s design and ensuring your design team uses seven tactics to reinforce your building against heavy snow.
Reinforcing existing roof framing jsmrem you said 2 x 4 rafters and a roof span of 28 feet.
They are excellent for both high wind and snowy areas.
Install these over your existing horizontal 2x6s 2 feet from the roof edge inside and paralel to the roof ends crosswise from your existing 2x6.
