Three Forms of Steel Structure Warehouse Roof Trusses

 Designing Steel structure warehouse roof trusses requires comprehensive and specific analysis. A reasonable truss form should meet the needs for drainage slope, building clearance, skylights, ceilings, and hanging cranes. The truss should be appropriately designed for forces, compression, tension, load, and stiffness. It is advisable to reduce the number and variety of truss members and nodes, ensuring uniform dimensions for easier construction. Based on their shape, steel structure warehouse roof trusses can be classified into triangular trusses, trapezoidal trusses, and parallel chord trusses.

Triangular Trusses: Due to their shape differing significantly from the moment diagram, with small angles between upper and lower chords and complex end node structures, triangular trusses have uneven force distribution and low lateral stiffness. They are suitable for roofs with purlins, steep slopes, and light roofs with medium to small spans. Triangular trusses can be further divided into Fink trusses, single-sloped trusses, and scissors trusses based on the arrangement of web members. The Fink truss is the most widely used due to its reasonable force distribution and ease of transportation. Single-sloped trusses are suitable only for trusses with lower chord ceilings, while scissors trusses are only applicable for spans below 18 meters.

Trapezoidal Trusses: These are suitable for large spans, gently sloping roofs, and roof structures without purlins.

Parallel Chord Trusses: These trusses have parallel upper and lower chords, with web members arranged in either a scissors or crossed pattern. They are often used for single-slope or double-slope roofs or as supports and bracing systems. The uniform length of members and fewer types of nodes make parallel chord trusses ideal for industrial manufacturing, as they are easy to produce, transport, store, and install.