The PEB Steel Structure of a Pre-Engineered Steel Building generally accounts for over 80% of the weight of the Pre-Engineered Steel Building. This 80% is an average and may change plus or minus 10% depending on the presence of mezzanines, crane runway beams, type of Panels used and the amount of building accessories that are included in a building. The unit of measure for PEB Steel Structures is metric ton (MT). As a general average, one square meter (1 m2) of PEB Steel Structure weighs 25 kg. Thus one MT of PEB Steel Structure = 40 (1000/25) m2 of building foot print. The PEB Steel Structure is made up of frames, secondary members and steel standard buyouts.
Frames in the PEB industry often refer to primary built-up & hot rolled members. Constant depth or tapered depth built-up members generally account for over 90% of the weight of frames while hot rolled members generally account for the remaining 10%.
Secondary Members in the PEB industry refer mostly to longitudinal roof and wall members that are roll formed from galvanized coils or press broken from narrow galvanized sheets. The raw material of these members is stocked in five thickness: 1.5, 1.75, 2.2, 2.25 and 2.5mm.
The following building components are considered secondary members: