Pre- Engineered Buildings

Pre- Engineered Buildings

Basic Building Parameters

 The basic parameters that define a pre-engineered building are: Building width, Building length, Building height, Roof slope, End bay length, Interior bay length and Design loads.

  • 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 width does not include the width of Lean-To buildings or roof extensions.
  • Length : The longitudinal length of the building measured from out to out of end wall steel lines.
  • 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. 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.
  • End bay length : The distance from outside of the outer flange of endwall columns to center line of the first interior frame column.
  • Interior bay length : 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.
  • Design 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.

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


Primary Framing

 DASHPROJECTS pre-engineered buildings are custom-designed to meet your exact requirements. The most common Primary Framing systems are shown below. Practically any frame geometry is possible. Consult a DASHPROJECTS representative for your specific requirements.

Primary Build-Up Members: Minimum yield strength is 34.5 kN/ cm2

At DASHPROJECTS we can produce other non-standard main frames, of almost any configuration, if required.

High grade steel plate conforming to ASTM A 572M Grade 345. Factory painted with a minimum of 35 microns (DFT) of corrosion protection primer.

Frame Types:

 Clear Span

Clear-Span (Arched)


Multi Gable

Multi-Span (Arched) AMS-1

 Multi-Span 1

Multi-Span 2

Multi-Span 3

Roof System

Single Slope

Secondary Framing

 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:

  • Act 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. pre-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 PEB

 Nearly 70% of all single storey non-residential construction now utilizes preengineered buildings. Applications range from small car parking sheds to 90 m (+), wide clear span aircraft hangars to low-rise multi-storey buildings. Almost every conceivable building use has been achieved using the pre-engineered building approach.

The most common applications of pre-engineered buildings are:


Industrial: Factories, Workshops, Warehouses, Cold stores, Car parking sheds, Slaughter houses, Cement plants, Steel rolling mills
Commercial: Showrooms, Distribution centers, Supermarkets, Restaurants, Offices, Service stations, Shopping centers
Institutional:Schools, Exhibition halls, Hospitals, Theaters, Auditoriums, Sports halls, Malls, Stadiums, Universities
Aviation & Military:Aircraft hangers, Administration Buildings, Residential barracks, Support facilities
Recreational:Gymnasiums, Swimming pool enclosures, Indoor tennis courts
Agricultural:Poultry-Dairy Farms, Greenhouses, Grain storage, Animal confinement