Based on an expected ground snow load of 30 psf, the snow load on our theoretical 3:12 roof is 18.9 psf. Seismic and Wind Force Calculator: Calculates and compares the wind and seismic story forces on a building, after entering general data (city, importance factor), seismic data (site class, seismic force resisting system), and wind data (exposure category, plan and parapet dimensions, and coefficients for directionality and topography). Simply-supported Beam Reaction Calculator: Calculates reactions for simply-supported beam with uniformly distributed load and/or up to 3 concentrated loads. 2. Reinforced Concrete Column Calculator: Analyses and designs tied or spiral (rectangular or circular) reinforced concrete columns based on the strength method. The beam calculator automatically uses ClearCalcs' powerful finite element analysis engine to determine moment, shear, and deflection as you work. First posted July 1, 2008 | Last updated July 23, 2016, Simply-supported Beam Reaction Calculator, Simply-supported Beam Moment and Shear Calculator, Steel tension element capacity Calculator, Reinforced Concrete Beam and 1-way Slab Calculator, Reinforced Concrete Stirrup Spacing Calculator, High-strength Steel Bolt Capacity Calculator, Reinforced Concrete Integrated T-beam, 1-way Slab, and Column Calculator. A more detailed discussion of the topic is also available. Use our Roof Snow Load Calculator to determine your design roof snow loads. Disclaimer: These calculators are not intended to be used for the design of actual structures, but only for schematic (preliminary) understanding of structural design principals. Temporary 2 x 4’s placed under the ridge every 16’ – 20’ carry considerable load and make Another way to calculate when too much snow is too much for the roof is Cornell's online snow-load calculator (bit.ly/VQgne9). surface (IBC, 2012). For the design of an actual structure, a registered and licensed professional should be consulted as per IRC 2012 Sec. If you’re thinking about replacing your roof with a new one, you will need a roof truss calculator. For the design of an actual structure, a registered and licensed professional should be consulted as per IRC 2012 Sec. Three-hinged Arch Reaction Calculator: Calculates reactions for 3-hinged arch with uniformly distributed load and/or up to 3 concentrated loads. All of the potential load cases required to fully design an actual structure may not be provided by this calculator. Story forces for wind and seismic loading will be displayed to the right of the values entered for seismic weight. For example, if building is 24′ x 24′ and has trusses, and the load on the roof will be for 30 lb snow load and a ceiling with no storage will Story forces for seismic loading are shown in Fig. If the snow weighs 10 pounds per cubic foot and there are 1.5 feet on the roof, each square foot of the roof is getting 15 pounds of pressure. Engineers use snow loads to help estimate the overall support a structure’s roof will need to withstand a region’s snowfall. or 1 in./ft. Project: Designer: Climatic Data. This easy to use calculator will display the wind speed by location via a wind speed map as prescribed Directions: Enter general data (city, importance factor), seismic data (site class, seismic force resisting system), and wind data (exposure category, plan and parapet dimensions, and coefficients for directionality and topography). Your Use our Roof Snow Load Calculator to determine your design roof snow loads. 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