PEB |  Mammut Building Systems
 

Introduction:

The PEB concept or the Metal Building System was first originated in the United States of America after the World War II, as one of the solutions to the demand of fast economic growth, and then transferred the concept to other industrialized countries. It consists of a complete steel framed building system, with pre-designed components to best suit the unique customer requirements. The final product is a complete building shell with sub structural systems including mezzanine floors, crane systems, canopies, fascias and interior partitions.
 
The PEB system offers multiple advantages to the end-user; the most notable are low initial investment, fast construction time, low maintenance cost, large clear spans, infinite choice of layouts, inherent resistance to earthquakes, ease of expansion and unique attractive appearance.
 
PEB System is since long a standard in commercial and industrial market segments such as warehouses, distribution centers and industrial facilities, are continuing to make greater inroads into the low-rise sophisticated building market. Commercial office buildings and mixed use facilities. Institutional and governmental constructions are some of the areas where PEB building systems are being used more and more. These buildings are increasingly recognized as reliable, aesthetically pleasing, energy efficient and cost-effective building alternatives. The sustainable green attributes of metal building systems with their recycled content and recycle-ability makes them a natural choice for today’s building owners and specifiers.  
  
Defining a PEB Building:
 
Pre-engineered should not be confused with pre-fabricated. The name Pre-engineered building was adopted for the following reasons:
• Pre-set methods for connecting and welding (standardized connections).
• Utilization of pre-determined stock sizes.
• Optimized design, detailing and fabrication, resulting in most economical (lower weight) and fast delivery (reduced engineering time and fabrication time). For more information refer www.mbma.com
 
Comparing PEB with Conventional Steel Building:
 
Feature
Pre-Engineered Steel Buildings
Conventional Steel Buildings
Design Criteria
AISC, MBMA, AWS
AISC, AWS, JIS, DIN, BS
Structural Base Material
All primary & secondary steel used by Mammut Building System has minimum yield strength of 50 KSI (345 N/mm2).
In 90% of the cases the primary and secondary steel used has minimum yield strength of 36 KSI (250 N/mm2).
Foundation
Simple design easy to construct and light weight
Extensive heavy foundations required.
Delivery
Average 6 to 8 weeks.
Average 5 to 6 months.
Sourcing & Coordination
Building is supplied complete with
Cladding and all accessories, including erection if required, all from one source of supply.
Many source of supply. Project Management time required to coordinate suppliers and sub-contractors.
Structure Weight
About 30% lighter through the-efficient use of steel. Primary framing members are (varying depth) tapered built-up plate sections with large depths in the areas of highest stress.
 
Secondary members are light gage (light weight) cold formed (low labor cost) “Z” - or “C” shaped members.
Z purlins / girts can be lapped.
 
Lapping reduces the deflection, and allows double thickness at the points of higher stresses (support points).
Primary steel members are selected from standard hot rolled “I” sections, which in many cases are heavier than what is actually required by - design. Members have constant cross-sections along the entire span, regardless of local stress magnitude.
 
Secondary members are selected from standard hot rolled ‘I” and “C” sections, which again are much heavier than required.
Design
Quick and efficient since standardization of P.E.B. has significantly reduced design time.
 
Basic designs are used over and over. Specialized computer analysis and design programs reduce design time and optimize material required.
 
Drafting is also computerized with minimal manual drawings. Design, detail drawings and erection drawings are supplied free of charge by the manufacturer. Approval drawings may be prepared within 10 days to 3 weeks. Consultant in-house design and drafting time is significantly reduced, allowing more time for coordination and review, and increasing margins in design fees.
 
Since most of the PEB are pin-based, the cost is reduced due to smaller sections at the base with smaller base plates and foundations (in absence of moments).
Each conventional steel structure is designed from scratch by the Consultant, with fewer design aids available to the Engineer.. Maximum engineering required on every project.
 
Generalized computer analysis programs require extensive input / output and design alterations.
 
Drafting is manual or only partially automated.
 
Much Consultancy time and expense is devoted to design and drafting, as well as coordination and review.
Accessories
Windows, Doors,
Ventilation etc.
Designed to fit the system, with standardized, interchangeable parts, including pre-designed flashing and trims. Mass produced for economy. All available with the building.
Every project requires special design for accessories and special sourcing for each. Flashing and trims must be uniquely designed and fabricated.
Erection
Easy, fast, step by step. Erection costs & time are accurately known, based upon extensive experience with similar buildings.
Slow, extensive field labor required. Typically 20% more expensive than a normal PEB building. In most of the cases, the erection costs and time are not estimated accurately.
Architecture
Outstanding architectural design at low cost. Conventional wall, and fascia materials, such a concrete, masonry and wood, can be utilized.
Special architectural design requires research and high cost.
Overall Price
Price per square meter may be as much as 40% lower than conventional steel.
High price per square meter.
Changes
Very flexible, tailor made, accepts changes and revisions easily.
 
Future expansion is simple, easy and cost effective. One supplier to co-ordinate changes.
Changes, revisions & additions can be difficult due to extensive redesign and co-ordination among suppliers and sub contractors.
Performance
All components have been specified and designed specifically to act together as a system, for maximum efficiency, precise fit up, and performance in the field conditions world wide has resulted in design improvements over time which allow dependable prediction of performance.
Components are designed in general for possible use in many alternative configurations. Design and detailing errors are possible in assembling diverse components into unique buildings. Each building design is unique, so prediction of how components will perform together is uncertain. Materials which have performed well in some climates may not in other environments.
Responsibility
Single source of supply results in total responsibility for one supplier, including design liability.
Multiple responsibilities can result in questions of who is responsible when components do not fit properly, insufficient material supplied, or materials fail to perform, particularly at supplier interfaces. The consultant carries total design liability.
 
 
 
 
Mammut Building Systems
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