Underslinging tube and fittings from kwikstage ledgers

rustyspanner

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Hi, don't know if this has been covered in here previously. Have been informed that a kwikstage ledger is not load bearing, so no tubes should be underslung from the ledgers whether its in tight areas where hop ups cant be used etc,, any advice on this. Thanks
 
yes inside boards, anywhere you cant use a hop up. We have been told to erect a tube ledger back and front, off the standards below the kwikstage ledger and transom out using tube again then boading out with scaff boards. That way the hop ups are independent from the kwikstage ledger, imposing no load onto the ledger,, hope that makes sense, it does leave a bit of a step down to the hop up though
 
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well said mr reade band + plate or doubles will suffice this isn't rocket science scc
 
the question is , can you undersling, or even punch up from a kwikstage ledger ,, the same as you can with a cuplock ledger.
 
Apparently you can't cause as you said the kwikstage ledgers are not load bearing, they banned it on Bifab because a few of the ledgers snapped, before that it was a speciality in their
 
Agree with Rusty; When iv'e worked for PHD in the past, always had to add ledgers in tube for ties beneath the kwik, likewise for extra boards.
 
the ledger of kwikstage is not loadbearing never mind the Cheap Shiit chinese and Indian copies.
punching off and underslung tubes put pressure on the the welded wedge and hookend which it was never designed for.
WE HAVE ALL DONE IT WITHOUT ANY PROBLEMS JUST DEPENDS WERE YOU ARE WORKING AND WHO DICTATES THE STANDARDS TO WHICH YOU NEED TO COMPLY.
on the plus side it may well lead to that shiit being phased out;)
 
the ledger of kwikstage is not loadbearing never mind the Cheap Shiit chinese and Indian copies.
punching off and underslung tubes put pressure on the the welded wedge and hookend which it was never designed for.
WE HAVE ALL DONE IT WITHOUT ANY PROBLEMS JUST DEPENDS WERE YOU ARE WORKING AND WHO DICTATES THE STANDARDS TO WHICH YOU NEED TO COMPLY.
on the plus side it may well lead to that shiit being phased out;)

I've never done such a thing!:eek::wondering::D
 
Hi -

The kwikstage ledgers were never designed to take loads vertically from transoms being placed on the ledgers. originally if my memory serves me right the diameter for the ledger was initially smaller than the standard 48.3MM tube which was an obvious tell tale sign that it should not be used with such things, puncheons for guardrails should be find but puncheon's used as supplementary standards is not allowed. that is why Kwikstage is not as practical as other systems because you need to use Kwikstage components to build it - unfortunately it was a system that did not move with the times shall we say.

OW
 
A long time ago in another life, we always had a large number of Kwikstage ledgers in stillages waiting to go off for new ends to be fitted. Twisting them in the v-pressing seemed to be a good way to finish off what had started as a small bend or a crack from chucking them around. The ends were naturally fragile under sideways loads.

This case probably has nothing to do with that but the fact that there is nothing to stop the ledger lifting out of the v-pressing apart from friction. If you undersling a transom and go out two (or three) boards, you need to have something to hold the back end down when the two boards are loaded. Kwikstage ledgers have nothing to do this. Cuplock ledgers are better because of the top cup and Allround have a c-pressing which works up & down.

Ignoring the friction in the wedge, the underslung transom does not have anything apart from the weight of the ledger to balance the two inside boards because it is not even in contact with the main platform boards.

Do not undersling transoms to carry cantilevering boards. Be cautious about underslinging tie tubes because they rely on the lugs being undamaged.
 
A long time ago in another life, we always had a large number of Kwikstage ledgers in stillages waiting to go off for new ends to be fitted. Twisting them in the v-pressing seemed to be a good way to finish off what had started as a small bend or a crack from chucking them around. The ends were naturally fragile under sideways loads.

This case probably has nothing to do with that but the fact that there is nothing to stop the ledger lifting out of the v-pressing apart from friction. If you undersling a transom and go out two (or three) boards, you need to have something to hold the back end down when the two boards are loaded. Kwikstage ledgers have nothing to do this. Cuplock ledgers are better because of the top cup and Allround have a c-pressing which works up & down.

Ignoring the friction in the wedge, the underslung transom does not have anything apart from the weight of the ledger to balance the two inside boards because it is not even in contact with the main platform boards.

Do not undersling transoms to carry cantilevering boards. Be cautious about underslinging tie tubes because they rely on the lugs being undamaged.

I would guess that's why many have dis guarded the system, good information though
 
that quickstage **** shouldve been melted down years ago,then it would keep chancer contractors from making scaffs use it.
should have been scrapped around about the time when hod-carriers could obtain scaff tickets.
 
Now Then Mr Downash Im Sure You Dont Mean That, About The Excellent Modular System Scaffold System That Is Kwikstage.
 
The kwikstage ledger was never designed to be a load bearing component, although it wil take some load. It is mild steel and has a 3.2mm wall thickness as oposed to the 4mm wall thickness of a standard scaffold tube.

If you nedd to undersling or punch off anywhere on a ledger then you should introduce suitable tube and fitting to support the load.

For inside boards there are sliding hop up brackets designed tfor use with kwikstage.

All ties should be on the upright to within 300 of the node point or again introduce tube and fitting.
 
I'd almost go with the 'not designed for carrying load' except for two facts:

1 - that the 1977 version of the Kwikstage handbook shows ties connected to a ledger at no more than 2' away from the standard. I would be less happy about a horizontal load than a vertical one but it is written down there.
2 - sliding hop ups must put both horizontal & vertical loads on ledgers which are worse than the loading on the inside ledger from underslinging transoms.

The handbook and the brochure of the same age both have some way of describing the limited load carrying capacity of the ledger but if you calculate the effect of a tie load on it, the words don't make much sense.

I think that a basic principle check with the knowledge of how the banana end works should allow a sensible design.

The kwikstage ledger was never designed to be a load bearing component, although it wil take some load. It is mild steel and has a 3.2mm wall thickness as oposed to the 4mm wall thickness of a standard scaffold tube.

If you need to undersling or punch off anywhere on a ledger then you should introduce suitable tube and fitting to support the load.

For inside boards there are sliding hop up brackets designed tfor use with kwikstage.

All ties should be on the upright to within 300 of the node point or again introduce tube and fitting.
 
TG6

There has been a lot of revisions of the kwikstage user guide since 1977 (the 84 version also showed this tie position), the user guide is again being updated. Just spotted something else that needs updating in the user guide, handy putting a comment on this thread and getting your comments back.

I do not know the level of design that was completed in the 70s or even the 80s for kwikstage

That is why I said it will take some loading, it ishowever Interserve recommended that the ledger is not tied to or punched up from in any way. Obviously this only applies to Interserve supplied products.

The 77 version of the user guide also allowed for hit and miss ledgers and a tie pattern that would not stand up up to date analysis.
 
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