LumberJocks

Torsion Box

  • Advertise with us

« back to Designing Woodworking Projects forum

Forum topic by sIKE posted 07-28-2008 05:02 PM 5033 views 0 times favorited 6 replies Add to Favorites Watch
View sIKE's profile

sIKE

1271 posts in 3928 days


07-28-2008 05:02 PM

Topic tags/keywords: question torsion box ras

I am working on designing a torsion box to support my RAS. I have never designed one of these before. The thickness and depth are what I am trying to determine. I am shooting to have the top of the RAS table level with the top of my Miter Saw Bench. With that taken into consideration, I have one more item to consider. The dust collection system is pre-ran against the wall and limits the total height of the torsion box itself, if I were to build the torsion box over it. The DC system I have drawn a 5” to make my life easy. I have two options from where I see it. I have been basing this design off of the Torsion Box episode of Wood Works (S04E09)

Option A:
If I build the torsion box over the DC it will be 29 1/4” deep x 26 1/2” wide x 2 13/16” high. I would have to punch a hole in the back of it for the DC (2 1/2” diameter).

Option B
If I move the Torsion box forward of the DC I then could make the box 24 1/4” high x 26 1/2” x 4” deep. I would add a small 5” deep x 26 1/2” wide strip to cover the DC system behind the Torsion box.

I am guessing that the RAS assembly is between 75 – 100 pounds (will get an accurate number here soon), the reason I ask this is how small should I make my grid work? I know Marks sized his to fit his brad nailer. After playing with the math the spacing from Left to Right will be 6 5/8” on center. Once I determine the depth of the box I will work out the spacing front to back. Will this work?

Materials
Interior grid and skins – 1/2” MDF
Outside Grid/Frame – 3/4” MDF

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"


6 replies so far

View Lee A. Jesberger's profile

Lee A. Jesberger

6866 posts in 4154 days


#1 posted 07-28-2008 05:35 PM

Hi sIKE;

Do you have a sketch of what you want to do?

With only three hours sleep, I’m better with pictures.

Lee

-- by Lee A. Jesberger http://www.prowoodworkingtips.com http://www.ezee-feed.com

View sIKE's profile

sIKE

1271 posts in 3928 days


#2 posted 07-28-2008 05:49 PM

I have two drawings one is very rough so I could get the picture in mind and start chewing on it and the second is not complete as I have not decided on the layout of the top. The first drawing also only took into account the RAS table being 3/4” thick, which has been replaced by the Craftsman RAS recall kit with the top being 1” thick! Here they are…

RAS 1

RAS 2

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"

View sIKE's profile

sIKE

1271 posts in 3928 days


#3 posted 07-28-2008 05:51 PM

I am still fighting the learning curve of Sketchup so my measurements in the drawings maybe off but I hope you can get the idea!.

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"

View sIKE's profile

sIKE

1271 posts in 3928 days


#4 posted 07-28-2008 10:55 PM

Looking at the diagram the panels are wider than they should be….

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"

View sIKE's profile

sIKE

1271 posts in 3928 days


#5 posted 07-30-2008 12:32 AM

Anyone?

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"

View Lee A. Jesberger's profile

Lee A. Jesberger

6866 posts in 4154 days


#6 posted 07-30-2008 06:08 AM

Hi sIKE;

As per the PM, here’s the photo’s I mentioned. The miter station and drawers aren’t supported from the floor in any way. It does use a torsion box type construction.

Photobucket - Video and Image Hosting

Photobucket - Video and Image Hosting

Let me know.

Lee

-- by Lee A. Jesberger http://www.prowoodworkingtips.com http://www.ezee-feed.com

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com