What type of truss commonly uses a mid-support?

The mid-support in a scissor truss is significant because it helps to stabilize the structure by distributing the load more evenly. Scissor trusses are designed with a unique configuration that creates a clear span and offers a vaulted ceiling appearance, which is often desired in residential and commercial construction for aesthetic and functional purposes.

The design of a scissor truss inherently includes a series of web members that intersect to form an 'X', which not only contributes to the truss's strength but also requires mid-support to maintain the integrity of the entire assembly under various load conditions, such as the weight of the roof and any additional loads like snow or equipment.

Having mid-support enables the scissor truss to effectively handle the thrust created by the roof pitch without compromising the overall structural stability. This is particularly important in applications where larger open spaces are needed, making the scissor truss an excellent choice for designs that require both strength and an aesthetically pleasing form.