Roof Live Load In Minnesota

Soil classification and bearing table.

Roof live load in minnesota.

Since the late 1960s and early 1970s roof construction for residential structures has consisted of pre manufactured engineered roof trusses. Snow load map ground load and roof load map per minnesota rules 1303 1700. 0 7 x pg ground snow load pf roof snow load roof snow load examples. The roof snow load is a uniform load on the horizontal projection of the roof.

This downward imposed load on the home is also known as the snow load. The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot. 0 7 x 50 psf 35 psf. 0 7 x 60 psf 42 psf below line.

Victor staley a building official in the town of brewster mass responds. The load increases with the use of heavier roofing material. This issue of live load vs. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures.

Egress windows for manufactured homes jan. The roof shall be designed for the live load indicated in table r301 6 or the snow load indicated. Frost depth map minnesota rules 1303 1600. G see minnesota rules chapter 1335 flood proofing regulations.

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 north zone design live load equates to 40 pounds per square foot the middle zone equates to 30 pounds per square foot and the south zone equates to 20 pounds per square foot. Psf pounds per square foot above line 60 psf.

To calculate roof snow load per residential building code. Round footing sizing table. The northern portion uses 60 pounds per square foot. The southern portion of minnesota which includes the twin cities metro area uses a ground snow load of 50 pounds per square foot.

The north zone middle zone and the south zone are identified on the roof load zone map above. 60 ground snow psf below line 50 psf 50 ground snow psf. Ground snow load might seem somewhat confusing until you read the basic premise that is identified in irc section r301 6 which states.