Framing Systems


Framing System

Building Length: Whenever possible maintain equal bay lengths throughout the building. When this is not possible, make all interior bays equal and make the end bays equal.

Example : A 100 m long building will have 10 interior bays at 9 m and 2 end bays at 5 m or 11 interior bays at 8 m and 2 end bays at 6 m.

Building Width: Whenever possible make building width a multiple of 3m. This is because roof purlins are spaced at 1.5m on centres and 3m is equal to two purlin spacings one on each side of the ridge.

Fast Construction pre-engineered buildings are custom designed to meet your exact requirements.

The basic parameters that define a pre-engineered building are :

Building Width : No matter what primary framing systems 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 sidewalk

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

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. The most common bay lengths are 6 m, 7.5 m and 9 m. Any bay length up to 15 m is possible.

Building Height : Building height is the eave height which usually i s the distance from the bottom of the main frame column base plate to the top outer point of the eave strut. Eave heights up to 30 m are possible. When columns are recessed or elevated from finished floor, eave height is the distance from finished floor level to top of 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 Fast Construction pre-engineered buildings are designed for the following minimum loads:

  • Roof Live Load : 0.57 kN/m2
  • Design Wind Speed :120 km/h

Framing System

Design for snow loads, earthquake loads, collateral loads, or any other local climatic condition (if required) must be specified at time of quotation.

Loads are applied in accordance with the latest International codes and standards applicable to pre-engineered buildings, as mentioned on the next page.