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vinod  
#1 Posted : 02 March 2014 06:54:19(UTC)
Rank: Forum user
vinod

I have got some aluminum mobile scaffolds of 12 meter height (size- 1.5 meter X 2.5 meter) and have used outriggers (04 nos at each sides) to support this structure. Initially the scaffold was erected for a single platform concept with 240 kgs SWL. But now due to the workplace demand, the contractor has proposed for having multiple platforms at every 2 mtr height difference on the same structure with a load capacity of 540 kgs and they have support from their local vendor.

My question is, up to what height a mobile aluminum scaffold is safe to use and such above mentioned alteration are allowed & safe?. I have seen no markings on the structural components nor the caster wheel they used in this scaffold.

I appreciate if anyone could advise me with some guidelines especially on mobile aluminum scaffold erection and usage?
RP  
#2 Posted : 02 March 2014 07:29:45(UTC)
Rank: Forum user
RP

Including the use of the outriggers to increase the height to base ratio, indoors 3.5 to 1 and outdoors 3 to 1

this is to the platform height only and assumes that the outriggers are placed correctly.
vinod  
#3 Posted : 02 March 2014 07:40:18(UTC)
Rank: Forum user
vinod

Thanks RP, could you let me know by referring which standard or guideline, i would get more info about mobile aluminum scaffolds, especially its base ratio, permissible height etc..
Finn141257  
#4 Posted : 02 March 2014 08:01:13(UTC)
Rank: New forum user
Finn141257

Vinod
I would recommend you refer to the PASMA website
http://www.pasma.co.uk/

PASMA are now active within the Middle East and are recognised as authority on mobile towers
and also you would do well to refer to AD EHSMS Code of Practice 26.0 "Scaffolding" available at
http://www.oshad.ae/en/pages/home.aspx

perhaps one of the questions you need to ask though
"Is a mobile tower appropriate for this particular task?"
it seems quite high to me and wonder why you would need to move it on a regular basis?
Perhaps static scaffold may be more appropriate?
Darach  
#5 Posted : 02 March 2014 09:03:10(UTC)
Rank: Forum user
Darach

Hi,

I have been a scaffolder for over ten years and I would not erect an aluminium mobile scaffold @ 12m in height!

Anything of this scale should be designed and erected by a competent advanced scaffolder, and preferably not aluminium. With alu scaff, always refer to the manufacturers specs, but if unsure, use the 3:1 smallest base to height ratio. If it is designed, fare enough. I have built mobiles 12 meters high out of tube and fitting, but this causes issues with moving 'the mobile' but if built correctly there is no risk surrounding stability.

Like Finn says...why scaffold?

Regards,

Darach
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