Manufacture Adjustable Steel Props Heavy Duty Steel Prop ...

Steel prop is a kind of vertical supporting system ,it is widely used in different supporting areas. Slab formwork and table formwork with its high loading capacity may meet maximum stability for your site jobs.

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Steel prop is mainly used for support formwork member with high load bearing capacity ,it is easy to install and adjustable the height  ,it give high speed in construction work 

 Adjustable Steel Prop/Prop Sleeve/Prop Nut

1. A complete set of steel prop consists of Top Plate, Base Plate,Inner pipe,Outer pipe, Prop Sleeve, Prop Nut and G Pin.

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2.The steel prop is easy to assemble and disassemble due to its simple structure.

3. Can be adjusted to any length within its range;it can be reused.

4. Widely used in proping system such as construction,plants and bridge etc.

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Hi,

A contractor has proposed propping above a first floor bay window from the outside whilst the bay window is replaced. The floors cannot be propped internally so he’s suggested bolting two Acrow props together, one on top of the other, in order to reach 5.2m height (size 4 Acrow extends only to 4.8m). Seems unlikely to be secure, is this typically ever done? If not, would appreciate possible solutions that I can discuss with them.

Thanks Bolting props together is not uncommon; however, testing shows (and this can be intuited by putting a little thought into unbraced heights and the fact you have introduced a potential hinge), the capacities will be much lower than using a single prop. Most of the big formwork/shoring/scaffolding companies, like PERI and Meva, have literature about stacking props and, iirc, will require at least a single prop tower be erected in order to use the stacked prop loads. I’ve never worked with Accrow products though so I don’t know what kind of literature they might have about this.

Judgement-In-Training STACKING PROPS IS COMMON PRACTICE (admittedly, I don't know if the props being asked for in this specific post are appropriate for stacking, though)

I would never try to determine the capacities myself but can you imagine if the field had to erect an entire scaffold system for every clerestory, bridge, or any other scenario with an extremely elevated slab? Erection of the shoring alone would kill budgets everywhere and the options for drive lanes below shored floors would be severely limited.


I'm not saying its appropriate for this scenario, but the question of "Can I stack props?" is not a definitive "No."

Judgement-In-Training Tomfh the largest prop is size 4 (4.8m) so it would need to be on a platform or, as you say, a larger prop, but what other options are there? This is a small domestic project to replace a bay window at first floor level. Just to repeat the original post that propping floors internally isn’t an option, only external propping. Ceinostuv,

Unless you can provide worked example, otherwise I would say the statement is false. We know that typical scaffolding is designed to be stackable, and some are height adjustable to the desirable elevation. It is not unusual to see wood/concrete blocks under the scaffold legs for light duty use, so to makeup a few inches, if it is must be level. In this case, one segment is 4.8m, two of them will be 9.6m, that obviously would require bracing, which potentially will be blocking the available working space, and endanger the operation that requires a lot of maneuver. retired13,

I'm not sure I understand what you're saying. What statement would you say is false?

For further clarification, do you recognize a difference between shoring props and scaffolds?

Nowhere in my posts did I imply that (2) Acrow 4's would need to be stacked; a 0 and 4 would work, if only heighth-wise (not necessarily strength-wise).

By the way, I agree completely with your statement

retired13 said: Don't splice manufactured shoring device, unless specifically permitted by the manufacture.

and my intention was to convey that there are manufacturers who provide that specific permission. Before your latest post, I considered us to be in agreement.

Judgement-In-Training