Question about wind load calculations

How do you calculate the final wind load when given these parameters? (Canada) - building importance factor: post disaster, lw=1.25(ULS) and lw=0.75(SLS) - q50=0.58 kpa - Terrain type: open - Design wind pressure: +/-0.92 kpa(ULS), +/- 0.55kpa (SLS) Our subcontractor is saying the resultant load is 40psf, and therefore the specified fencing is no good, it’s with the engineers for review I’m just a busy bee at the GC, but I’m trying to understand how they’re getting 40psf. Are they adding the q50 loading to the ULS loading and then multiplying it all by the 1.25 factor?