Basic Building Parameters

February 14 2017

A Basic PEB steel structure building comprises of:

  • Columns
  • Rafters
  • Eave Purlin
  • Purlin
  • Girt

The size of the building is determined by the:

Building Width

Which is defined as the distance from outside of eave purlin of one side wall to the outside of eave purlin  of the opposite side wall.

Building Length

It is the length between girts located at endwalls.

Endwall Option

  • Flush endwalls, is the distances between the outside flanges of endwall columns in opposite endwalls is considered as the building length.
  • By-pass endwalls, is the distance between the outside of wall girts in opposite endwalls is considered the building length.

Basic Building Parameters

Roof Slope (x/10)

It is the angle of the roof with respect to the horizontal.

The most common roof slopes in the area is 0.5/10 and

1/10.


Interior Bay Length

It is the distance between the center lines of columns

of two adjacent interior rigid frames.

Most economical range of interior bays is 7.5m and 8.5m. However, the common interior bay lengths in the industry are 6, 7.5, 8, 9 and 10m. Maximum economy, limit the end bay length to 6 meters or les and use bypass endwall girts.

End Bay Length

  • Flush endwall girts: Distance from the outside of Endwall girts to the center line of the columns of the first interior rigid frame.
  • By-pass endwall girts: Distance from the outside of endwall girts to the center line of the columns of the first interior rigid frame.

Building Height

  • Eave Height: Distance from finish floor level to The top of the outer point of the eave Purlin.
  • Clear height: Distance from finish floor level to the Knee where the column and rafter connect.

Steel Line

It is the plane of the out to out of secondary members along the perimeters of the building.

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