Minimum rectangular frame for 4x8' plywood

Hardware
1

Hi,
I am looking at setting up cement anchors for a horizontal frame, and I’m trying to figure out the needed spacing to be able to cut a sheet of 4’ x 8’ plywood.
I have played with the calculators (example: Maslow frame, http://lang.hm/maslow/maslow4_frame.html), but I still cannot figure out the optimal spacing for the anchors.
From what it looks, a 10x8 frame would not allow to use some space on the long ends of the sheet, and a 11x8’ would allow to work on the entire surface.

  1. are those calculations correct? 11x8?
  2. I see this comment from Bar in another thread: “The smallest that I’d recommend is the default wooden frame which is 10’x8’…12’ is even better if you have room.”
    I am looking to use the garage floor + cement anchors; what is the math on this?
  3. are the belts long enough for an 11x8 or 12x8 frame? (would like to confirm before drilling)

Thanks!
Ilia

1 Like
2

iliaden wrote:

Hi,
I am looking at setting up cement anchors for a horizontal frame, and I’m trying to figure out the needed spacing to be able to cut a sheet of 4’ x 8’ plywood.
I have played with the calculators (example: Maslow frame, http://lang.hm/maslow/maslow4_frame.html), but I still cannot figure out the optimal spacing for the anchors.
From what it looks, a 10x8 frame would not allow to use some space on the long ends of the sheet, and a 11x8’ would allow to work on the entire surface.

  1. are those calculations correct? 11x8?

That is not taking into account the angled from the opposite corners (which are
the limits of the green area in my calculator

13’ square seems to work for everything

  1. I see this comment from Bar in another thread: “The smallest that I’d recommend is the default wooden frame which is 10’x8’…12’ is even better if you have room.”

That was based on his estimates from useing the pre-release version and the
older version of maslow which had different angle requirements.

I am looking to use the garage floor + cement anchors; what is the math on this?

no different than any other type of frame (but easier to put anchors wherever
you want)

  1. are the belts long enough for an 11x8 or 12x8 frame? (would like to confirm before drilling)

yes, you have 14.5 ft of belt, so that will handle a 13x13 frame with some (not
a lot, but some) to spare

note that we don’t know how badly you are impacted going out of the green area,
the main focus has been on calibration, We need people to test our assumptions

David Lang

3

I’m using a 12’ x 8’ area with anchors on my garage floor successfully.

2 Likes