Clear Span

The definition is an easy one to define and is simply how wide you want your building to be. We have engineered some of our frame models well over 200′, and can probably go even wider, however at a certain point you must remember about clear span is understanding the cost savings on the Frame when center columns can be used. For example, Perka offer a 50’ to 120’ wide buildings using our 10,000 frame model. Below is an example of what customers save, vs. using 8,000 model, in frame cost using center columns, a 20 live load and 90 mph wind load with a height of 14′ as an example.

On 50’ wide:		Low savings (5%)
On 60’ wide:		Low savings (15%)
On 70’ wide:		1 row of centre columns saves 24%
On 80’ wide:		1 row of centre columns saves 30%
On 100’ wide:		1 row of centre columns saves 21%
On 120’ wide:		1 row of centre columns saves 16% 2 rows of inside columns saves 35%