Pre-engineered and pre-fabricated are two different things. The following justifications led to the use of the term “design of pre engineered steel buildings in pakistan“:
- Predetermined techniques for joining and welding (standardized connections).
- Utilising stock sizes that have been predetermined.
- Optimized design, manufacture, and details lead to the most affordable (lower weight) and quick delivery (reduced engineering time and fabrication time).
Design of Pre Engineered Steel Building in Pakistan
It has two types of components one is primary and other one is secondary.
A PEB building’s primary members serve as its primary structural components. Three hot rolled plates of equal or different thicknesses are welded together to produce an I-Section in a built-up structure. High-quality steel plates meeting ASTM A572M Grade 345 Type 1 (minimum yield strength is 345 N/mm2) are used by Unicorn Chemical.
Benefits of using Built up Sections in the design of pre engineered steel building in Pakistan
A built-up section has an advantage over a hot-roll profile section. It can be profile into a taper member. That precisely complies to a building’s stress concentration. Built-up sections are more cost-effective than hot rolled profiles due to the flexibility. They have variable thicknesses for the top and bottom flange. The built-up pieces are factory paint using any other paint system of the customer’s choosing. Or at least 50 microns (DFT) of red or grey oxide primer.
These are the common hot-roll profiles sections that are offer on the steel market. That adhere to different international standards.
For usage as end wall columns, fascia posts, brackets, canopy framing, crane cap channels, stair stringers, strut tubes, mezzanine columns, and angle bracing, Unicorn Chemical specifies minimum hot rolled sections for the design of pre engineered steel buildings in Pakistan. For various profiles, the grade complies with the information below.
Galvanized steel coils that meet the requirements of ASTM A653M Grade SS 340 Class 1. It is an equivalent are cold form into purlins, girts, eave struts, base angles, and gable angles, with thicknesses. It is ranging from 1.5mm to 2.5mm.
Individual Skin Profile
One of the most appealing aspects of a metal construction system is its metal panels (for sheeting). Metal sheets used for roof and wall construction, interior roof and wall liners, partition panels, fascia panels, and soffit panels. These are all referred to as panels.
The single skin profiled sheet is perfect for use in commercial, industrial, and agricultural structures. These profiles can utilise as wall and roof panels. It offer with design flexibility to meet your requirement in the design of pre engineered steel buildings in Pakistan. The profiles come in two variations, M45-250 and M45-150, and can made of steel or aluminium.
ASTM A792, Grade 340 Class I-compliant steel panels are commonly available. A protective steel coating made of an aluminum-zinc alloy with a weight of 150 grammes per square metre. Moreover, a composition of 55% aluminium and 45% zinc shall use. In comparison to the galvanised option, the aluminium zinc alloy coating offers around a 4-times greater corrosion resistance.
For mill finish and pre-painted panels, normal stock aluminium panels are construct from alloy AA3105, temper H46. A 5 micron primer paint and an 18+ micron polyester paint. They are apply in the mill to the outer face of pre-painted aluminium. The polymer used to create the polyester paint is on par with or better than silicon polyester.