Prefab Metal Frame Notes:-

Prefab Metal Frame Notes-------

Cap & Trim System: See Install Details and Spacing - Load chart for placement of blocking. Note that sheet goes from peak of roof to eave and the sheet must be supported on all 4 edges. This will require blocking at peak and eave, as well as at top and bottom of side walls. Blocking is also required in the body of the sheet. The Spacing - Load chart will address this. The prefab metal building manufacturer should be able to provide stock lengths of 1"x1" to 2"x2" tubing for this purpose and may even cut to length. Angle clips are required to fasten blocking tubes to frame. All intermediate sheets will need to be cut to 47-3/4". Sheets on ends can be 48", Corner Trim will cover gap between edge of sheet and outside of frame.

Base & Cap System: With this system one can simply attach roof purlins and wall girts to the frame. (Best to pre-drill frame and fasten purlin or girt via screw from inside of frame. Screws fastening purlin to frame from outside will protrude into polycarbonate.) The Base & Cap page addresses this in great detail. The prefab metal building manufacturer should be able to provide stock lengths of 1"x1" to 2"x2" tubing for this purpose and may even cut to length. Given that prefab metal building manufacturers position framing 4 ft. on-center it is best to cut all intermediate sheets to 47" to 47-1/4". This will result in Base & Cap lining up with frame. Note that on 16 & 25mm sheets trim a little off each edge to maintain a rib close to sheet edge. Sheets on ends can be 48", Corner Trim will cover gap between edge of sheet and outside of frame.

Note: Cap & Trim System comes in 8 ft. lengths only. The Base & Cap System comes in 8 ft. and 24 ft. lengths. Spanning over purlins requires one length of Base going from peak to eave. Lengths required and waste generated may dictate which system is best to use.

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