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Snow load on roof trusses.
This web based application is made freely available courtesy of the advertisements displayed on this page.
The current snow load criteria irc 2012 2015 r301 2 3 irc 2012 2015 figure r301 2 5 ibc 2012 2015 1608 begins with a base value i e.
To figure out the load on your roof take the depth of snow in feet and multiply it by the weight of a cubic foot of snow.
Lengthand widthof your roof.
The information provided here is not intended to replace truss drawings.
Dol can play a part in some snow areas where the building official bo has made the determination snow will remain upon the roof for extended time periods.
These factors account for variables such as site exposure building importance roof slope and the thermal properties of the roof.
Overestimation of snow loads can unnecessarily increase the cost of construction.
Snow loads are influenced by elevation general weather and moisture patterns slope direction exposure roof or trail bridge configuration and wind direction and severity.
If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow.
To calculate the weight of snow on a roof use the first two sections of our snow load calculator.
Ground snow load to which several modification factors are applied.
The snow load calculations provided by this online tool are for educational and illustrative purposes only.
A dead load is carried constantly by the truss.
A live load is a temporary load that puts stress on the structure.
Trusses are designed to carry two types of loads.
Duration of load dol for snow is typically 1 15.
Medeek design assumes no liability or loss for any designs presented and does not guarantee fitness for use.
The top chord live load tcll of any roof trusses will be the greater of pr or lr.
Actual load due to snow will depend upon the shape of the roof and its capacity to retain the snow and each case shall be treated on its own merits.
Live loads and dead loads.
Engineered truss drawings should be obtained for specific site locations incorporating specific snow load wind speed eave wall height building length and importance factor use of building.
You can enter these values in any units you d like including meters and feet.
Live loads include wind precipitation foot traffic and all other weight that comes and goes.
