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Primary Framing

The primary framing is the main load-carrying component of the building system. Without the complete primary frame, the building would not stand up to vertical or lateral loads over time. Commonly framing systems are symmetrical about ridge line. Framing systems unsymmetrical about the ridge lines are also possible but may require more engineering time and possibly longer deliveries. Practically any frame geometry is possible.

The basic parameters needed for the design of primary members are as follows.

  • Building Width
  • Building Length
  • Building Height
  • Roof Slope
  • End Bay Spacing
  • Interior Bay Spacing
  • Design Loads

Building Width: No matter what primary framing system is used, the building width is defined as the distance from outside of eave strut of one sidewall to outside of eave strut of the opposite sidewall.

Building Length : The distance between the outside flanges of endwall columns in opposite endwalls is considered the building length. Building length is a combination of several bay lengths.

End bay length: is the distance from outside of the outer flange of endwall columns to center line of the first interior frame columns.

Interior bay length:is the distance between the center lines of two adjacent interior main frame columns.

Building Height : Building height is the eave height which usually is the distance from the bottom of the main frame column base plate to the top outer point of the eave strut

Roof Slope (x/10) : This is the angle of the roof with respect to the horizontal. The most common roof slopes are 0.5/10 and 1/10. Any practical roof slope is possible.

Design Loads : Unless otherwise specified pre-engineered buildings are designed for the following minimum loads:

Roof Live Load: 0.57 kN/m2

Design Windpeed: 137 km/h (3-sec gust)

Design for snow loads, earth quake loads, collateral loads, crane loads or any other loading condition, if required must be specified at the time of request for quotation.

Loads are applied in accordance with the latest codes and standards applicable to pre-engineered buildings unless otherwise requested at the time of request for quotation.