PRE ENGINEERED BUILDINGS
Ever since the industrial and commercial revolution in the country, need for economical and affordable constructions has become a priority. One of the revolutionary concepts for catering this demand is Pre Engineered Buildings.
Pre Engineered Steel Buildings (PEB) revolutionized the construction market using built ups in place of conventional hot rolled sections. Pre Engineering Buildings are the most economical and fast construction buildings which are pre designed considering all the building parameters. Pre Engineered Buildings are steel structures built over a structural concept of primary members, secondary members, and the cover sheeting connected to each other.
Advantages of Pre-Engineered Buildings (PEB):
Construction time: PEB reduces the total construction cost by the least 40% which leads to faster occupancy and early revenue.
Lower cost: Saving is accomplished in design, manufacturing and erection cost.
Large clear span: In PEB the buildings can be given up to 90m clear spans which is the important advantage of PEB with column free space.
Flexibility of expansion: PEB can be easily expanded in length by adding additional bays.
Quality control: PEB’s are manufactured under controlled conditions depending on the site and hence the quality is assured.
Low maintenance: PEB’s have high quality paint systems for cladding which gives long durability and low maintenance costs.
Applications of Pre-Engineered Buildings (PEB):
- Factories
- Warehouses
- Workshops
- Gas stations
- Showrooms
- Aircraft hangers
- Metro stations
- Vehicle parking sheds
- Schools, Indoor stadium roofs
- Bridges, Railway platform shelters
- Outdoor stadium canopies
PRIMARY FRAMING
Primary Frames are the main load-carrying structural steel components. They may be Clear-span Rigid Frames, Continuous Beam Frames, or Post & Beam Frames. Primary frames are designed in accordance with the steel construction manual published by American Institute of Steel Construction (AISC). Manufacturing dimensional tolerances are in accordance with the requirements of ‘Metal Building Manufactures Association’ (MBMA) of USA, “Low Rise Building Systems Manual”. Besides AISC and MBMA, we also design buildings with IS-875, 1984 and IS-875, 2007. Built-up sections are fabricated from hot rolled steel plates confirming to ASTM A 572M grade or equivalent with minimum yield strength of 345N/mm2 (50ksi). The most common primary framing systems are illustrated here. All structures shown are symmetrical about the ridge line. Framing systems unsymmetrical about the ridge line and Multi span Framing Systems with unequal width modules are possible too. Practically any frame geometry can be erected.
Clear span
maximum practical width = 90 m
Multi gable
Maximum practical module width = 80 m
Multi span1
Building with one interior column – maximum practical module width = 70 m
Multi span2
Building with one interior column – maximum practical module width = 70 m
Single slope
Building without interior columns – maximum practical width = 50 m
SECONDARY FRAMING
Secondary Framing Members are the structural members which carry loads to the primary framing members.
Secondary structural framing refers to C sections and Z sections, Grits, Eave struts, Wind bracing, Flange bracing, Base angles, Clips and other miscellaneous structural parts.
Standard C & Z sections and Grits are roll-formed Z- sections with 64 mm flanges 200 mm deep.
Eave struts are 200 mm deep with 100 mm wide top flange. Cold-formed members are designed in accordance with the American Iron Steel Institute (AISI).
