Rafter Load Support Chart for Blocking Placement
Next See Base & Cap Install Details and do material list take off
Snow & Wind Load Position & Attach for mid-sheet attachment. Back To Base & Cap Pricing Page
Rafter Load Support Chart: On-Center of framing & Base is 49″ 16 & 25mm X-Wall Chart for 80 plus lb. loads
Outside of structure to center of first or last Base is 48-1/2″. See Blocking Detail
On-Center of Intermediate framing members is 24-1/2″.
24.5″ on-center – No spacers, hold blocking back 1/4″ from surface of poly. X-Wall Chart for 80 plus lb. load.
Load in lbs./sq. ft. On roof slope over 7/12 snow slides off. Spacing less. No specs available.
• Sheet must be supported on all 4 edges, minimum1/2″ of sheet bearing on Base or frame. If using sheets cut along width, and no longer have a rib at edge, position so first rib supported by a minimum of 1/2″.
See 8-25mm Polycarb, some 20 yr Warranty