Roof Live Load In Minnesota

Ground snow load might seem somewhat confusing until you read the basic premise that is identified in irc section r301 6 which states.

Roof live load in minnesota.

This table says that. D dead load l live load l r live roof load w wind load s snow load e earthquake load r rainwater load or ice water load t effect of material temperature h hydraulic loads from soil f hydraulic loads from fluids. In areas of the state outside of certified local government jurisdictions the design snow load shall be based on the ground snow loads developed in snow loads for structural design in montana authored by f f. 0 7 x 60 psf 42 psf below line.

Snow load map ground load and roof load map per minnesota rules 1303 1700. The north zone design live load equates to 40 pounds per square foot. A clay tiled roof may have a dead load. Since the late 1960s and early 1970s roof construction for residential structures has consisted of pre manufactured engineered roof trusses.

This issue of live load vs. Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched. The minnesota department of commerce requested some initial research be completed to identify opportunities for additional load capacities for these roof components. The load increases with the use of heavier roofing material.

Roof loads are a downward vertical force on the home. The north zone middle zone and the south zone are identified on the roof load zone map above. The minimum design roof snow load. 0 7 x 50 psf 35 psf.

Psf pounds per square foot. The roof shall be designed for the live load indicated in table r301 6 or the snow load indicated. This downward imposed load on the home is also known as the snow load. Arch 331 note set 13 1 s2014abn 2.

Soil classification and bearing table. To calculate roof snow load per residential building code. Egress windows for manufactured homes jan. F the ground snow loads to be used in determining the design snow loads for buildings and other structures are given in minnesota rules part 1303 1700 ground snow load to verify by county.

Square footing sizing table. The required roof snow loads for minnesota aren t clearly spelled out anywhere but the numbers can be found by using table r301 2 1 of the minnesota administrative rules. G see minnesota rules chapter 1335 flood proofing regulations. However a south roof load zone home cannot be installed in either a middle or north roof load zone.

Frost depth map minnesota rules 1303 1600. Victor staley a building official in the town of brewster mass responds. Schilke civil agricultural engineering montana state university august 1989. The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot.