Queen Post Truss | King Post Truss Vs Queen Post Truss |

The King post truss & Queen Post truss are part and parcel of the sloping roof. Both of them are found in residential, commercial or industrial buildings.

King Post Roof Truss Queen Post Roof Truss
01. A king post contains a central vertical post that is utilized in architectural or bridge designs, dealing with tension to support a beam underneath from a truss apex above. 01. Queen Post Truss can be described as a pitched roof support provided with two vertical tie posts which are attached among the tie beam and the rafters.
02. The king post truss comprises of the following components:
• Tie Beam
• Two Inclined principal rafter
• Two struts
• King post
• Ridge Beam
02. The Queen post Truss comprises of the following components.
• Two Queen posts
• Two Principal Rafters
• Struts
• Tie Beam
• Straining beams
• Straining sills
• Purlins
03. King post truss is mostly effective if the length of the span remains between 5 to 8 m. 03. Queen post truss can be applied if the length of the span remains between 8 to 12 m.
04. One vertical post is arranged at the centre of the roof that is known as king post. 04. Two vertical posts are arranged on 2 sides maintaining proper spacing that is known as queen post.
05. Straining beam and straining sill are not required. 05. Straining beam and straining sill are essential to retain the queen post in steady position.
06. King-post is attached with main rafter, strut and tie beam. 06. Queen-post is attached with principal rafter, strut, Straining beam, straining sill and tie beam
07. The top ends of two main rafters are attached with ridge pitch. 07. Top ends of two main rafters are coupled with the queen posts heads.
Variations among King Post Truss & Queen Post Truss