Structure Weight |
Pre-engineered buildings are on the average 30% lighter through the efficient use of steel. Primary framing members are tapered (varying depth) built-up plate sections, with larger depths in the areas of highest stress. Secondary members are light gage (light Weight) roll-formed (low labor cost) "Z" or "C" shaped members. |
Primary steel members are selected from standard hot rolled " I " sections, which are, in many segments of the members, heavier than what is actually required bx design. Members have constant cross-sections regardless of the varying magnitude of the local stresses along the member length. Secondary members are selected from standard hot rolled "I" and "C" sections, which are heavier. |
Design |
Quick and efficient; since PEBs are mainly formed of standard sections and connections, design time is significantly reduced. Basic designs are used over and over.
Specialized computer analysis and design programs optimize material required. Drafting is also computerized using standard details that minimize project custom details. Design, shop detail sketches and erection drawings are supplied free of charge by the manufacturer. Approval drawings are usually prepared within 2 weeks.
PEB engineers design and detail pre-engineered buildings almost every day throughout the year resulting in faster and more efficient designs.
Consultant's in-house design and drafting time is considerably reduced, allowing more time for coordination and review, and increased margins on design fees. |
Each conventional steel structure is designed from scratch by the consultant, with fewer design aid, available to the Engineer.
Substantial engineering and detailing is required on every project. Generalized computer analysis programs require extensive input/output and design alterations. Extensive consultant time is devoted to design and drafting, as well as coordination and review, often at a significant expense.
Each project is a separate case, engineers need more time to develop the designs and details of the unique structure.
More complicated design requiring extensive design and drafting time from Consultants. |
