Does such a tool exist?

[anto44]

What about a scissors type car jack and some wood?

 

[Kram]

Use some screws.

 

[ajlelectronics]

Like others i have generally used clamps reversed with block of wood to suit, but if you want the exact thing for the purpose.
Plasterboard props

Looks better, but I had better measure the space I have. It is a little more than three leisure batteries in boxes, side by side.

 

[Puglet1]

A length of wood with a scissor type car jack for adjustment?

 

[ajlelectronics]

Use some screws.

Yes, but screws sticking out of the side of a boat are unsightly, dangerous and is the type of work I am eradicating currently!

 

[gaz1]

This type, you might have to faff with spacers.

if you use that with a wood clothes line prop with wedges it can expand rather well

 

[Pigeon_Droppings2]

I use these for my boat bulkheads...just to prop while the adhesive goes off.

I'm very happy with them...the ends are on a ball joint which works for my application as I'm propping from the hull sides.

You can get mini acrow props...they're used for underpinning but are very heavy and not very flexible on height adjustment.

 

[eSCHEn]

I've done this with M20 and M16 threaded rod inside of a piece of 25mm galvanized conduit. The threaded end of the conduit is wound into an appropriate hole in some 4" x 2" timber to provide a soft base and the end of the threaded rod with a similar arrangement into similar timber (or whatever shape you want). Use a nut and washer to let the two parts be expanded into whatever gap you want. It's cheap, repeatable and very easy to adapt to wherever.

I can dig one out of the shed of shame if you want to see what I mean.

 

[cheb]

Well yes that would do, but I was hoping for something very adjustable. A threaded tube with an Acme thread and a threaded rod to go into it with a Tommy bar. Plates each end. That is what I have in my head.

A scaffold pole foot, they are usually adjustable

 

[MetalMonkey]

As suggested you can use the quickclamps as a pusher, and adjust to suit with props or blocking - or if you need something with more muscle, have a look at "construction jacks", branded ones not that cheap but there are a lot of copies about which are more economical.

 

[Nomad]

Extending drywall / pasterboard supports are almost ideal but are normally for holding boards at ceiling height - maybe see if you can fine a cheap set and cut them down to length?

Canadian Hardware & Tools

We provide all types of services to suit all your NEEDS such as s plus rotary hammer drill, sds plus drill bits, sds max hammer drill, rotary hammer drill, Sds max chisel bit, Taping tools, masonry drill bit and more.

www.chtools.ca

I've had good results in the past using a length of 2x2 cut to the width of the hallway.
Put an offcut of floorboard on the opposite wall to spread the load, put a floorboard or sheet of thick ply on top of your new board to avoid marking it, gently tap the 2x2 into place. Beers !

 

[ajlelectronics]

I use these for my boat bulkheads...just to prop while the adhesive goes off.

I'm very happy with them...the ends are on a ball joint which works for my application as I'm propping from the hull sides.

You can get mini acrow props...they're used for underpinning but are very heavy and not very flexible on height adjustment.

And we have a winner, duly ordered!

My grateful thanks for all of the brilliant ideas from everyone. What a wonderful forum this is; 42!

 

[addjunkie]

If its just jbs etc, put CT1 on the back and hold in place using a couple of dabs from a hot glue gun.

 

[Kram]

Yes, but screws sticking out of the side of a boat are unsightly, dangerous and is the type of work I am eradicating currently!

Perfectly good as a temporary measure while the glue sets. Then remove and fill the holes.

 

[Cobbler]

Numberplate sticky pads would hold it while the CT1 went off

 

[Pigeon_Droppings2]

I really like those adjustable props I posted....there's adjustment both via the trigger and also the column is telescopic which is very handy when working in confined spaces.

I may get another pair of them...while they're still so cheap!

 

[Dev]

A length of 20mm box, cap on the end with a threaded hole. Then through holes all along.
A length of 25mm box, cap, threaded hole. Sleeve the 2 together, bolt through the nearest hole in the 20mm to get close and bolts in the caps for fine tuning.

 

[Erie Fred]

Truckers use these, cheap enough to cut down the center tube for the shorter length https://www.harborfreight.com/ratcheting-cargo-bar-96811.html

 

[MysterG]

Trench struts

Size 0 Trench Strut, Heavy Duty 0.32m - 0.47m

Our new acrow props are used in the construction industry for temporary support of ceilings, walls and trenches.

www.scaffolding-direct.co.uk

 

[RWD3M]

CT1 wants 24 hours to cure. I want to do some fixing of fuseboxes etc so it would affect the bond if I did it that quick. Unless you are suggesting a fast cure adhesive for wood to fibreglass?

I think that you should come up and have a look at the old tub. I'm going back up tomorrow,

Can't do tomorrow got a friend arriving for a couple of days.

I'll drop you a text.