Basic Building Parameters
A basic PEB Steel structure building comprises of :
Building Frame System
Clear Span (CS)
Multi Span - 1 (MS-1)
Multi Span - 2 (MS-2)
Multi Span - 3 (MS-3)
Single Slope (SS)
Single Slope - 1 (SSMS-1)
Single Slope - 2 (SSMS-2)
We design the building to take the loads of the followings crane systems as per customer requirements.
Crane rails, modular beam, hoist and bridge are excluded from our supply. For most economical and accurate building design, please advise your crane manufacturer’s contact details at time of request for quotation.
Top Running Crane
Fascias are used to conceal the gable roof slope of building.
Center Curved Fascia
Top & Bottom Curved Fascia
Roof Extension, Canopies & Roof Monitors
Sidewall End-wall roof extensions are 1500mm wide, by extending the End Bay purlins beyond the end-wall steel line. They can accommodate and optional soffit panel without the need for additional framing.
Sidewall Roof Extensions are 1500mm wide they are made of 200mm deep hot rolled or built-up member, and 200mm flush eave channels and purlins making it possible to add an optional soffit panel without the need for additional framing.
1500mm wide cantilevers beyond the steel lines of the building located below the eave.
With a throat opening width (w) of l000mm made of hot rolled or built-up covered with panels similar to the ones used for roof and walls of the building.
Canopy At Side-wall
Roof Monitor Cross-section
A mezzanine can occupy the full area or just partial area of the building. It is an elevated flooring system located inside the outer steel of a PEB. The mezzanine framing is normally connected to the main rigid frame columns for lateral stability.
A typical mezzanine structure consists of:
Beam/Joist Conn to Mezz. Column
Joist Connection to Mezz. Beam at End-wall
Mezz. Beam Conn to Mian Frame Column
Flush Mezz. Joist Connection to Mezz Beam
BSI STEEL Deck Profile - 54/241
Mezzanine deck panel is intended to carry only the dead load of the wet concrete. It acts as a permanent shuttering. BSI mezzanine deck is (54/241) and is made out of 0.7mm galvanized steel that conforms to ASTM A635M Grade SS:340.
Roof Platform & Staircases
Is a structural frame, mounted on top of the roof. It is designed to support heavy roof accessories such as A/C units, water tanks and others. It is comprised of pipe, stub columns and structural framing made of built-up or hot rolled section. Grating is used and sometimes handrails are required.
Single Flight Stair
Double Flight Stair
End-walls & Bracing Systems
End-walls are constructed with either Rigid Frames or more economical Bearing Frames (a PEB standard). (End-wall girts frame to corner columns and wind columns either in a flush manner or in the more economical by-pass manner). BSI Steel Bearing Frames and Wind Columns are manufactured from built-up I-sections instead of the less robust C-sections used by other PEB manufacturers in this region.
All horizontal loads on a structure must eventually be carried to column bases and then to the building substructure (foundations and ground slabs). Horizontal loads result from the action of wind forces, seismic (earth quake) forces and overhead cranes on the building structure.
Used in the roofs and walls of buildings to transfer wind forces to the building substructure. Standard bracing system commonly used are galvanized cable strands, solid smooth rods and flat bars or angles.
Used to transfer longitudinal horizontal loads of traveling overhead cranes to structure when the capacity of these cranes range between 5 MT and 20 MT.
Used to transfer longitudinal horizontal loads of traveling overhead cranes to substructure when the capacity of these cranes exceed 20 MT. They are also used as wall bracing in very high buildings.
Used in exterior sidewalls or between the interior columns of Multi Span/Multi Gable buildings when diagonal bracing is not allowed because of a requirement for clear unobstructed space. Portal frames are made from built-up columns and beams. Their columns flanges are stitch-bolted to the webs of the rigid frame columns and extend down to 150 mm above F.F.L. Care must be taken to ensure that the bottom of the portal frame beam is higher than the required unobstructed height.
Secondary Structural Members
Secondary structural members include roof purlins, wall girts, eave struts, C-sections, flange braces, gable angles and base angles. Purlins, Girts, Eave Struts and C-Sections (used as base channels and as door jambs and headers in framed openings of Double Sliding Doors and Roll Up Doors) are Cold formed from 345mm wide galvanized coils in thicknesses of 1.5, 1.75, 2.0, 2.25 and 2.5mm. They are made from material that conforms to ASTM A653M Grade SS: 340 Class IG90 and are designed in accordance with the 2002 Cold formed Steel Design Manual, published by “The American Iron and Steel Institute” (AISI).
A common practice in the PEB industry is to connect the sidewall girts to the sidewall rigid frame columns in a by-pass condition and to connect the end-wall girts to the end-wall wind columns in a flush condition. The by-pass approach is more practical, even in end-walls, because it allows cables, pipes, etc. to be laid within the 200mm girt line all around the building. It also allows for a better construction of partial height block-walls (normally 2.25 to 3.00m high) which are very common in this region.
4 or 5mm thick angle sections used to prevent rigid frame members from twisting or buckling laterally under load. They are used on one side or both sides of the rafters/columns depending on the magnitude of the required restraining loads.
Base angles are fastened to the concrete floor with the masonry nails at 500mm on centers. They transfer the wind load from the wall panels directly to the slab. When interior wall liner is required, a base channel (C-Section) is used in lieu of a base angle.
Gable angles are connected to bottom flanges of roof purlins at building ends using self-drilling fasteners. They transfer the wind load from the endwall panels (which are fastened to this gable angle) to the roof purlins, at the gable end of the building.
Single skin Roof and Wall Panels manufactured by BSI-STEEL are rolled formed from either 0.5 mm (Nominal) thick AluZinc coated steel (AluZinc is an Aluminum I Zinc alloy) which conforms to ASTM A 792 M Grade 345 classes having a minimum yield strength of 34.5 KN I CR 2 with Zinc I Aluminum coating conforming to AZ 150 (or optional). The coating is achieved by hot deep process of 55% aluminum and 45% zinc alloy. 0.7 mm (nominal) thick AluZinc coated steel is optional available in both mill finish and in pre-painted finish (in four standard colors).
Interior liner panels, partition panels, fascia panels and soffit panels are made using the same profile in 0.5 mm frost white AluZinc coated steel, 0.7mm pre-painted Aluzinc is an option that may be supplied, in any BSI-STEEL Standard color, for large projects.
Single Skin Panel BS 38/200
Curved eaves are standard in roof monitors and optional in building eaves. There are two details for curved eaves. We recommend the curved eave with projection because it is considerably easier to erect. Fitting the ribs of the curved eave panels simultaneously with the ribs of both the roof and wall panels is a very difficult task whereas fitting the ribs of the curved eave panels with the ribs of the roof panels only is considerably easier.
Curved Eave With Projection
Curved Eave Without Projection
Standard Building System Integration Colors