If anyone would like to contact me at firstname.lastname@example.org
, or phone me at 509-243-1640, I am happy to explain my design in more detail.
As far as the frame - the centerline keel beam is 6061-T6, 2" X 4" channel - pretty stiff. Any side-loading or twist (frame torque) is offset and transferred to the lower side rails by equidistant lateral 1" X 3/4" X .125" wall 6061-T6 rectangular tubing - all TIG welded in place. So the deck is supported by the siderails, fore/aft rails, lateral struts and keel beam.
The deck is 1" poly webbing, sewn into 7 1/2" squares. Each lateral and longitudinal strap is cam-lock buckle adjustable on both sides, and on both forward and aft ends of the lower frame (uses a LOT of buckles). Buckles are located beneath the deck - allowing the sag of the deck to be adjusted tight enough to walk on. The poly deck webbing is overlaid and sewn with a very strong mesh material. It keeps anyone (or their dog) from stepping through the deck straps, yet is porous enough to allow water to flow through freely.
And yes - you COULD slip on the deck and "crack your nuts" on it, I guess, if they're big enough.... : )
The intent was to provide a surface to walk around on, and strong enough to support the weight of gear and people, without excessive sagging and stretching.
Look - I know this design is not for everyone....there is no such thing as "one size fits all".....but after testing the frame, I'm satisfied with the results, and sure any rafter that enjoys this kind of design, will be too.
Once again, I really appreciate the comments - I know most of you bloggers are expert in the field, and I value your input.
Avatard - I read your suggestions regarding the shortened zipper approach. VERY insightful! I considered this approach. If you drop me a line via email, I'll explain why I didn't go with this design for two very good reasons having to do with hoop stress and manufacturing - just don't want to bore anyone with any pseudo-intellectual engineering BS.
Thanks again, everyone - especially you, Avatard - for keeping my on my toes!