u/cmtc

Is Room Big Enough For Tension Board 2
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Is Room Big Enough For Tension Board 2

Hey all - I’m planning to build a 12 ft tall × 8 ft wide Tension Board 2 on the top floor of my A-frame house and wanted some advice on both the structure and the spacing.

The roof pitch is 45°, and ideally I’d like to attach the board directly to the existing rafters rather than build a freestanding frame. The rafters appear pretty substantial - roughly 9 in × 3.5 in - and seem structural, but I’m not sure whether mounting directly to them is a bad idea with the dynamic loads from board climbing.

The other thing I’m trying to sanity check is whether the space will feel too cramped.

I’ll be using 6 in pads, so the wall has to start 6 in off the floor/wall intersection. That reduces the usable space from about:

  • 10 ft 3 in vertical/horizontal clearance to
  • 9 ft 9 in clearance

Because the ceiling slope is 45°, that leaves me with about 13 ft 8 in of sloped ceiling length, which seems like enough room for a 12 ft board.

If I also add a 6 in kicker, I’d need to move the wall another 6 in inward, leaving roughly:

  • 9 ft 3 in vertical clearance
  • 9 ft 3 in horizontal clearance
  • about 13 ft 1 in of sloped ceiling length

Does that still sound workable for a 12×8 TB2 setup, or am I cutting it too close? I don't want to hit my head on the other side of the A frame on a dynamic move.

Also curious if anyone here has mounted directly to rafters in an A-frame and regretted it (or had success with it).

Edit: Room Width is incorrect in image, it is 12 feet wide, not 10ft 3in.

Edit 2: I will remove the backwall on the right to have full width of the A Frame room

u/cmtc — 8 days ago