These buildings are not industrial grade shelters and, as such, some caution must be exercised under some winter storm conditions….
Snow removal, when occasionally required, is a simple task. Uneven snow loading is deceiving, since the total weight is not a problem but the lateral force can cause the hoops to distort.It is rare to have any significant snow build up on the roofs; however,
A wet snowfall followed by dropping temperatures
A building 90° to another building that has a higher roof, could cause a surge in snow weight when the snow on the upper roof slides off.
Preventative measures for excessive snow build up (where possible):
Install a heat source to melt the snow
Economical additions to increase your structure’s snow resistance:
Use closer hoop spacing for the first 12’ section away from another bigger building
Pointers for removing snow:
Use a padded piece of 1×4 wood on a pole (create a “T” shape) as the best tool for gently bumping the inside of the cover
Freezing rain, followed by dropping temperatures, Lots of snow followed by rainfall. It is easy to triple the weight of the snow load in 30 minutes.
How to install windbraces video is on our YouTube Channel
Below are examples of structures with cross-ties, bars going across the peak for larger structures. These are optional to reinforce the structure. Please see the supplemental Cross-Ties page in the installation guide as well as additional notes below the photos
We’ve had a number of questions regarding cross ties being missing from orders. This isn’t the case, and is done on purpose because the last cross tie interferes with the end cover, so we ship the orders “short” on cross ties to compensate for this. We are sorry for any confusion this has caused and are happy to help you with any other installation questions you may have.
Cross ties, also known as collar ties, are a horizontal bar in a structure which ties the left and right side together. They are usually 3’ to 4’ down from the peak. The purpose of cross ties is to add load strength to the structure. Many people look at cross ties as a nuisance because of lost head space but they have a three fold benefit.
- By forming the triangle at the peak you create benefit for the dead load which is usually snow load. The top can not come down when the sides can not spread.
- By tying the left and right sides together, you create strength for the live load, commonly referred to as wind load. When the wind blows from the left, the right side holds it from pushing inward and vice versa.
- Most importantly, it decreases the rocking motion which can stress a building over time.
- The cross tie can also supply a very useful support area for things that need to be suspended.
It is important to remember that when you spread out the load you create strength.Photos & Video: Purlins, Windbraces & Crossties