Carlson Sheet Metal Spokane Washington custom aluminum and stainless fabrication


Exhaust Stack "yellow" frame is a ladder and stand. Angle iron frame with steel grating all painted yellow.	84" diameter duct with 30" branch. Men are welding 30" branch into 84" pipe. Pipe has 3" x 3" angle iron ring each end.


Air Ducts. 1500' of round duct on building roof. Duct size range from 25" diameter to 84" diameter.	Rectangular Duct. 80" x 80" 90 degree elbow. 3/16 thick body with angle support.