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INortonAVI  
#1 Posted : 02 October 2024 08:04:30(UTC)
Rank: New forum user
INortonAVI

Please feel free to PM any potential links so as not breach forum rules.

Our site maintenance manager has asked if I know any companies that could provide a quote for the following. 

Please would you be able to provide a quote to supply and fit a roof edge protection system as per the below photo but complete with additional toe boards for two of our roof tops. Measurements are as follows:-

Roof No.1 Perimeter approximately 315m

Roof No.2 Perimeter approximately 253m

Roof pitch is 6°

Roof 1 has 10 corners

Roof 2 has 4 corners

We are thinking of the below system if it is suitable?

peter gotch  
#2 Posted : 02 October 2024 11:59:12(UTC)
Rank: Super forum user
peter gotch

Hi IN

In practice there are only a few companies that make this type of protection and Google should find them.

A 6 degree pitch is about as close to being actuall flat as you get but you still need to think about your specifications.

First, do you want the edge protection to be fully continouss, with no gaps e.g. for external ladder acess - this is important as stability depends on a number of variables including the length, ballast, if any, and the number of "returns" - so in simple terms your roof with 10 returns is much easier to make compliant than a roof with only 4 - IFF the protection is continuous.

Then, you probably need a system where individual standards can be lifted out of position to enable maintenance of the edge of the roof INCLUDING under the feet of the edge protection.

You also need to consider whether very high winds are reasonably forseeable as the loadings the edge protection should be designed for become greater.

+ any activities done on the roof that might indicate a need for the top rails to be higher than the usual 1100mm and/or an additional rail.

Good luck, Peter

thanks 1 user thanked peter gotch for this useful post.
INortonAVI on 02/10/2024(UTC)
Roundtuit  
#3 Posted : 02 October 2024 12:56:42(UTC)
Rank: Super forum user
Roundtuit

Whilst appreciating the picture indicates ballast blocks at the end of the extensions has this been installed the righ way round?

If you consider athletics hurdles orientated in the manner shown the top would tip over (to danger) if a load were applied against the top rail (which itself appears to be cradled in a u-section as does the intermediary).

I would have expected the extensions to point to the edge of the roof to provide some stand-off against items being carried finding their way over the top and crashing to the ground.

thanks 2 users thanked Roundtuit for this useful post.
INortonAVI on 02/10/2024(UTC), INortonAVI on 02/10/2024(UTC)
Roundtuit  
#4 Posted : 02 October 2024 12:56:42(UTC)
Rank: Super forum user
Roundtuit

Whilst appreciating the picture indicates ballast blocks at the end of the extensions has this been installed the righ way round?

If you consider athletics hurdles orientated in the manner shown the top would tip over (to danger) if a load were applied against the top rail (which itself appears to be cradled in a u-section as does the intermediary).

I would have expected the extensions to point to the edge of the roof to provide some stand-off against items being carried finding their way over the top and crashing to the ground.

thanks 2 users thanked Roundtuit for this useful post.
INortonAVI on 02/10/2024(UTC), INortonAVI on 02/10/2024(UTC)
peter gotch  
#5 Posted : 02 October 2024 18:21:57(UTC)
Rank: Super forum user
peter gotch

What is shown in the photo is the configuration that is common.

See e.g. Figure 40 at Health and safety in roof work (hse.gov.uk)

There is a British Standard which sets out what dynamic load the top rail should be able to withstand in normal conditions. 0.83kN/m which in layperson's terms works out as a tall person hitting the rail about two thirds of the way up their body.

Any risks of eg. materials coming off the roof need to be considered separately to what is essentially a system for preventing a person falling - excepting the toe-boards that you want fitted.

thanks 2 users thanked peter gotch for this useful post.
INortonAVI on 03/10/2024(UTC), Roundtuit on 03/10/2024(UTC)
Roundtuit  
#6 Posted : 03 October 2024 08:01:08(UTC)
Rank: Super forum user
Roundtuit

There do appear to be significant differences between what has been posted here and Figure 40 from HSG33:

In Fig 40 the extensions lying orizontal across the roof appear longer than the vertical uprights, attached to a plate of unknown fixing and only on alternative uprights.

The named supplier is still in business which should help the OP's enquiry.

Roundtuit  
#7 Posted : 03 October 2024 08:01:08(UTC)
Rank: Super forum user
Roundtuit

There do appear to be significant differences between what has been posted here and Figure 40 from HSG33:

In Fig 40 the extensions lying orizontal across the roof appear longer than the vertical uprights, attached to a plate of unknown fixing and only on alternative uprights.

The named supplier is still in business which should help the OP's enquiry.

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