floor sub-frame
design
(plan view)
chassis & sub-frame
(plan view from below)
Floor specs:
● Constructed as a "sandwich": 4mm (5/32") Finland Birch on the outsides, with mostly 3/4"x3" poplar framing and 3/4" Styrofoam in the middle. Total thickness is 1 1/16".
● main body length: 9' 10.5"
● width: 60"
● tongue box length: 18"
● tongue box width: 48"
● clearance from front of tongue box to center of ball hitch: 34.5"
Floor weight:
● poplar wood sub-frame: 38 lbs.
● plywood skins: 39 lbs.
● Styrofoam insulation, pocket hole screws, wood glue and epoxy: 10 lbs.
● subtotal floor: 88 lbs. for 44.8 sq. ft. (55.4. sq. ft. total including front box floor - 10.6 sq. ft. for footwell cutout). The floor has a lot of poplar framing, but still weighs only 2 lbs./sq. ft., which is slightly more than 5/8" (nominal, actually 19/32") plywood at 1.8 lbs./sq. ft., and slightly less than 3/4" (nominal, actually 23/32") plywood) at 2.2 lbs./sq. ft. However, the floor has about 3.3 times the stiffness of 3/4" plywood.
● + 16 gauge steel footwell structure: 30.5 lbs.
● + footwell floor (structural sandwich): 14 lbs.
● + 2 removable footwell cover panels/tables (structural sandwiches): 15.5 lbs.
● subtotal footwell and cover: 60 lbs.
● Total floor structure: 148 lbs.
Floor
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©2003-4 Rik Keller
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