BASIC BUILDING PARAMETER & TERMS
The basic parameters that define a pre-engineered building are:
Building Width is defined as the distance from outside of eave strut of one sidewall to outside of eave strut of the opposite sidewall. This does not include the width of Lean-To buildings or roof extension:
Building Length is longitudinal length of the building measured from out to out of end wall steel lines.
Building Height is the eave height which is the distance from the bottom of the main frame column base plate to the top outer point of the eave strut. 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) is the angle of the roof with respect to the horizontal. The most common roof slopes are 0.5/10 and 1/10. However any practical roof slope is possible.
End bay length is distance from outside of the outer flange of endwall columns to center line of the first interior frame column.
Interior bay length is 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.
Design Loads unless otherwise specified PEBs are designed for the following minimum loads:
## Roof Live Load: 0.57 kN/m2
## Design Wind Speed: 110 km/h
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.
Fast Construction pre-engineered buildings are tailor made to meet your requirements. The most common Primary Framing systems are shown below. However any frame geometry is possible.
- Minimum yield strength is 34.5 kN/ cm2
We can produce other non- standard main frames, of almost any configuration, if required.
Building without interior columns – maximum practical width = 90 m
Arched Clear-Span – maximum practical width = 90 m
Maximum practical width = 24 m
Maximum practical module width = 80 m
Building with one interior column – maximum practical module width = 70 m
Building with three interior columns – maximum practical module width = 70 m
Building without interior columns – maximum practical width = 50 m
Purlins, girts and eave struts are secondary structural members used to support the wall and roof panels. Purlins are used on the roof; girts are used on the walls and eave struts are used at the intersection of the sidewall and the roof.
Secondary members have two other functions:
- Acts as struts that help in resisting part of the longitudinal loads that are applied on the building such as wind and earthquake loads
- Provide lateral bracing to the compression flanges of the main frame members thereby increasing frame capacity.
Purlins, girts and eave struts are available in high grade steel conforming to ASTM A 607 Grade 50 or equivalent, available in 1.5 mm, 1.75 mm. 2.0 mm, 2.25 mm, 2.5 mm and 3.0 mm thickness. They come with a pre-galvanized finish, or factory painted with a minimum of 35 microns (DFT) of corrosion protection primer.
- Minimum yield strength is 34.5 kN / cm2
APPLICATIONS OF PRE ENGINEERED FABRICATED BUILDINGS
Almost two thirds of single storey commercial/industrial construction, in the USA, are pre-engineered buildings. The applications of pre-engineered buildings range from small car parking sheds to 90 m (+) wide clear span aircraft hangars to sprawling ware houses. Almost every conceivable building use has been achieved using the pre-engineered building approach.
Pre Engineered Buildings are primarily being used in:
|Aviation & Military