What is a Bill of Materials?
Bill of Materials (BOM) is a detailed list of all the materials and components needed to complete the pre-engineered building. PEBs are buildings that are manufactured at the factory and assembled and erected at the site. Structural design consultants for factories must provide an accurate, comprehensive BOM for proper, timely procurement, fabrication and erection of the PEB.
What are the contents of a BOM?
Typically, the BOM contains the following:
- Structural components: This section contains primary components of the structure like columns, rafters, beams and trusses. These components support the load of the structure.
- Secondary Framing: The BOM lists secondary framing elements, including girts and purlins. These secondary framing components give additional support for the exterior cladding and roofing.
- Roof and Wall Panels: The BOM has information about the specifications for the roof and wall panels. The panels are an outer layer of the building. They contribute to its aesthetics, insulation, and weatherproofing.
- Connections and Fasteners: The BOM provides information about the types and quantities of connection materials, bolts, nuts, screws, and other fasteners needed to assemble the components securely.
- Accessories: Accessories, including ridge vents, louvers, doors, windows, insulation, gutters, and downspouts, also are there in the BOM. These accessories improve the aesthetics and functionality.
- Finishes: In case interior finishes or specialized exterior finishes are a part, they also find mention in the BOM.
- Foundations: Items needed for the foundation, like anchor bolts and other items to secure the building to the foundation, form a part of this section of the BOM.
- Erection and Assembly: The tools and tackles for the assembly and erection also form a part of the BOM.
- Quantities and Specifications: Each item in the BOM has the quantity mentioned with clear and precise specifications.
Conclusion
The BOM is essential for cost estimate preparation and guides during the project schedule preparation. When the structural consultants for factories provide a detailed BOM for a Pre Engineered Building, it helps streamline the process of production, assembly and erection. The BOM also helps minimize errors and ensures the successful completion of the project. It is also a vital communication tool between designers, manufacturers, contractors, and other stakeholders involved in the project.
