We built 5 of these last year, if you can weld you cant beat it. It's light weight and should last longer than wood. We had roughly $90 in the conduit and $120 in the siding. Instead of tin we used PVC corrugated roofing panels from Home Depot:
The plan in the link below is for 10' bases, the attached material list is for 5' bases.
-Cutting List:
http://forum.gon.com/showthread.php?t=627722-Set shooting rail at 41" high. Door opening is 24". Shooting window
opening is 12 inches.
- Corner and cross bracing for platform on tower base is welded underneath
so plywood lays flat.
- Bottom corner bracing on shooting enclosure is welded on top so enclosure
sits flush on plywood floor.
Tower Stand measurements- Base/ ladder section all Ύ EMT Conduit
(6) 5 stalks legs and ladder
(7) 20 Ladder rungs
(2) 7 Horizontal around bottom of tower stand base
(2) 5 Horizontal around bottom of tower stand base
(4) 6 Horizontal across top of tower at platform including (2) center cross braces to support plywood
(2) 4 Horizontal across top to finish rectangle
(24) 12 corner braces (use up scrap first)
(3) Cut to fit (roughly 3.5) leg cross bracing
Tower Stand measurements-shooting enclosure all ½ EMT Conduit
(9) 48 Short side (depth) wall supports, and center floor support
Cut 2 out of a 10 stalk leaves 24 scrap for corner braces or 12 bottom braces
(6) 72 width bottom/top/window supports
(2) 72 Front uprights- ends are not flattened on any uprights
(4) 69 Rear uprights and door frame (3 drop for angle on roof)
(8) 12 angle braces for floor of stand - and small shooting window rails on either side of door- 2 can be cut from scrap left over from horizontal frame
(6) 24 angled corner baces from upright to lower shooting window rail
140 ½ EMT Conduit, 140 of Ύ EMT Conduit, 1 sheet ½ plywood, tin, sides
