Unistrut

[lomb]

I need to mount a condenser on a non gable end out over the gutter to stop chavs stealing or damaging it.Unfortunately the eves and gutter stick out far enough that the condenser wont fit unless the cantilever arm is 900mm long. The units are on the small size and weigh around 40kg. Unistrut only do a 720mm long arm, is there anyway to extend this with an extension and is it safe?

[El Padre]

You can get some L brackets and make your own cantilever to the length that you need, you could also reinforce it by fixing a piece of channel cut at 45 degrees, with a bracket bolted top and bottom.

If you ask your supplier for a Unistrut catalogue it will all make sense.

Cheers

[lomb]

Yes i have had a look at the catalogue, the angle brackets dont seem safe in that it could pull out of the horizontal bar easily. I am thinking of a 750mm cantilever arm and a unistrut coupler perhaps reinforced with the angle as you say from underneath? This is probably safer as the back of the compressor at least will rest on the solid part of the cantilevered arm.

[lomb]

What is the best place to get the unistrut components needed in Dublin. Cheers

[monkey spanners]

I'm sure our local ducting company sell 900mm unistrut style brackets, might be worth trying some different companies.

[Brian_UK]

Yes i have had a look at the catalogue, the angle brackets don't seem safe in that it could pull out of the horizontal bar easily.<snip>

The forces on the horizontal arm would be downwards so there is not reason to expect a joint failure.

I haven't seen that happen yet but if you are concerned then why not weld them together yourself?

[lomb]

The forces on the horizontal arm would be downwards so there is not reason to expect a joint failure.

I haven't seen that happen yet but if you are concerned then why not weld them together yourself?

I could i guess, but the idea of the standar cantilever bar + a joiner which is a square and wraps the unistrut for 15cm and 4 bolts mean it is unlikely to fail and is simple.

[thebigcheese]

why not just get a bracket made up urself. have seen many of these usaly for holding fridge condensers

[al]

Lomb

RDL and Fridge spares do a 900 arm

alec

[Andy AC]

Why not just use the cantilever brackets you have available, cut some unistrut to required length and bolt them to the original brackets?

Andy

[yinmorrison]

If only it was that simple! Forces and Moments calculations is what you need to check.
Does this look safe?

[lomb]

Why not just use the cantilever brackets you have available, cut some unistrut to required length and bolt them to the original brackets?

Andy

This is what i will do but i need unistruts joiner that then bolts the segments together. Im not too worried about moments, its a 40kg unit and the wall is reinforced concrete what could possibly go wrong?

[lomb]

Lomb

RDL and Fridge spares do a 900 arm

alec

Thanks il try them if i cant get the extenders, what are 900mm arms used for normally some kind of industrial/fridge compressors?

[lomb]

If only it was that simple! Forces and Moments calculations is what you need to check.
Does this look safe?

Ive checked unistruts catalogue and the max weight at the very end of a 720mm arm is 65 kg and 80kg on a 600mm arm, therfore on a 900mm arm surely 40kg is ok,and the weight will be spread along a foot of that so should be safe!

[eggs]

Hilti do a 1000mm arm

Eggs

[Andy AC]

Use bolts and zebedees to hold the strut to the bracket, you don't need joiners.

Andy

[woody1209]

2 thoughts... you can get double width cantilever arms ie reinforced on the bottom so it is essentially 2 arms in one.

Also if you fix unistrut vertically up the wall as opposed to simply anchoringthrough the eyes in the bracket you will get more fixings.

[Brian_UK]

If only it was that simple! Forces and Moments calculations is what you need to check.
Does this look safe?

The problem with this bracket is that the vertical arms fixed to the wall are too short.

Made longer the load would be spread properly.

[frank]

If you zoom in on that picture, you can see that the suction pipe suddenly reduces just before it connects onto the service valve

Looks like 1+1/8 down to 3/4 or 5/8

[eggs]

If you zoom in on that picture, you can see that the suction pipe suddenly reduces just before it connects onto the service valve

Looks like 1+1/8 down to 3/4 or 5/8

Those new 10hp Tosh systems do that. I put one in the other day...1-1/8 suction reduced to a 7/8 flare connection......why?

Eggs

[Brian_UK]

Those new 10hp Tosh systems do that. I put one in the other day...1-1/8 suction reduced to a 7/8 flare connection......why?

Eggs

Ever tried doing a 1 1/8" flare ?