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Posted By dave marshall
hi all
following on from a site visit today i have been tasked along with a very experienced supervisor to action an RA/METHOD statement to include the use of a tower to reach the height of 6 mtrs on a roof to instal cladding. if it goes ahead the task will be sub-contracted out for the access equipment. is this an accepted practice for towers to be used at such height? taking into account a suitable fixing point to existing steel work, adverse weather conditions potential collapse overturning of the tower etc.
i always like to stay within the limitations of my knowledge what are your thoughts please? sorry about the lack of explanation of works.
thank you
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Posted By TonyB
Hi Dave,
There is not enough information to pass comment. It will depend on other factors like -
Length of time the job is expected to take
Can the work be undertaken from within the tower
Will traffic be a consideration
Can the tower be stabilised during the erection stage before it can be tied on
etc. etc. etc.
You need to consider the hierarchy of control from WAH to determine the best solution rather than deciding on the intended way of working and then deciding if it can be done.
All the best,
TonyB
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Posted By graeme12345
Towers used for external work should only go as high as 3 times the smallest base width.
So if it freestanding (not against a wall or something)you will have to measure the distance between each outrigger, then X 3 to give you the height limit.
You have got to apply the WAH hierarchy, then use the manufacturer's instructions to erect the tower, tie it to anything you can, inspect it before use and record inspection, then inspect and record every seven days, including weekends and again after any bad weather.Then keep an eye on it as it is being used.Induct evryone in its use and record
Remember it is not a loading / or lifting platform
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Posted By steven bentham
Dave
Sounds like you are refering to external roof cladding of a steel framed building? [a big shed or factory type building]
If this is correct; obvious risks are falling from outside edge or internal fall whilst on top of roof cladding. 6 metre fall is either serious or fatal.
External falls are can be protected by guard rails, internal falls by netting, it is becoming common to run netting up to the guard rails. Access to the work area can be from the tower.
Without the guard rails and netting it is unlikely that a tower provides a safe means for working.
There is lots of roof work guidance about. And you can google search for good examples.
regards
P.S. If your problem is different your posting needs more details.
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Posted By Steve Clark
Dave,
it depends what you mean by tower scaffolding. We recently had contractors build a 10m high scaffold tower for roof work. It was a significant structure and was used for work that lasted a week (the tower took 2 days to erect). The reason - previous contractors used a genie boom and whilst the guys were on the roof moved it away thus sranding them up there. HSE guidance is conflicting i.e. some guidance says that access equipment can only be used for access to work whilst remaining in the MEWP and some says that using MEWP can be the safest method to access a roof. Doesn't make life easy! As we told the accountant at the time - it would have been much cheaper, safer and easier to have fitted permenant access to the roof when the building was constructed.
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