Advantage
PEB Advantage
|
Property |
Pre-Engineered building (PEB) |
Conventional Buildings |
| Structure Weight | Pre engineered buildings are on the average 30% lighter because of the efficient use of steel. Primary framing members are tapered built up section. With the large depths in areas of higher stress. | Primary steel members are selected hot rolled “T” sections. Which are, in many segments of the members heavier than what is actually required by design? Members have constant cross section regardless of the varying magnitude of the local stresses along the member length. |
| Secondary members are light weight roll formed “Z”or “C” shaped members. | Secondary members are selected from standard hot rolled sections which are much heavier. | |
| Design | Quick and efficient: since PEB’s are mainly formed by standard sections and connections design, time is significantly reduced. Basic design based on international design codes are used over and over. | Each conventional steel structure is designed from scratch with fewer design aids available to the engineer. |
| Specialized computer analysis design programs optimize material required. Drafting is also computerized using standard details to minimize the use of project custom details. | Substantial engineering and detailing work is required from the very basic is required by the consultant with fewer design aids. | |
| Delivery | Average 6 to 8 weeks | Average 20 to 26 weeks |
| Foundations | Simple design, easy to construct and light weight. | Extensive, heavy foundation required. |
| Erection Simplicity | Since the connection of compounds is standard the learning curve of erection for each subsequent project is faster. | The connections are normally complicated and differ from project to project resulting tin increasing the time for erection of the buildings. |
| Erection Cost and Time | Both costs and time of erection are accurately known based upon extensive experience with similar buildings. | Typically, conventional steel buildings are 20% more expensive than PEB in most of the cases, the erection costs and time are not estimated accurately. |
| The erection process is faster and much easier with very less requirement for equipment. | Erection process is slow and extensive field labour is required. Heavy equipment is also needed. | |
| Seismic Resistance | The low weight flexible frames offer higher resistance to seismic forces. | Rigid heavy frames do not perform well in seismic zones. |
| Cost of Construction | Price per square meter may be as low as by 30 % than the conventional building. | Higher price per square meter. |
| Architecture | Outstanding architectural design can be achieved at low cost using standard architectural details and interfaces. | Special architectural design and features must be developed for each project which often requires research and thus resulting in higher cost. |
| Future Expansion | Future expansion is very easy and simple. | Future expansion is most tedious and more costly. |
| Safety and Responsibility | Single source of responsibility is there because the entire job is being done by one supplier. | Multiple responsibilities can result in question of who is responsible when the components do not fit in properly, insufficient material is supplied or parts fail to perform particularly at the supplier/contractor interface. |
| Performance | All components have been specified and designed specially to act together as a system for maximum efficiency, precise fir and peak performance in the field. | Components are custom designed for a specific application on a specific job. Design and detailing errors are possible when assembling the diverse components into unique buildings. |
| Building Accessories | Designed to fit the system with standardized and interchangeable parts. Including pre designed flashing and trims. Building accessories are mass produced for economy and are available with the building. | Every project requires different and special design accessories and special sourcing for each item. Flashing and trims must be uniquely designed and fabricated |