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at Height Guidance Note WAH 001
Working on stacks
that penetrate fragile roofs WAH 002
Platforms WAH 003
Common questions on platforms and
What are the inspection
access platforms require a survey after assembly/installation but before use.
For existing platforms that have not been built to a recognised design standard,
the platform must also have a base-line survey
platform should then be subject to interim/periodic surveys at a frequency
determined by risk assessment (as determined by a Structural Engineer) and then
a further inspection prior to use.
Who should carry out the base-line
A suitably competent person. (e.g. A Structural
Who could carry out the interim
inspections and the prior-to-use inspections?
A suitably competent person.
Who could carry out the prior to
be a member of your own Engineering staff who has received suitable and
sufficient instruction/training from the Structural Engineer on what are the
points and scope of the interim and prior-to-use inspections. Details of this
instruction/training should be formally documented.
Is there any other time that the
fixed platform should be inspected?
each time that an exceptional circumstance has occurred which may affect the
safety integrity of the fixed platform, e.g. vehicle impact, shock loading,
extreme adverse weather etc.
WAH001 Inspection of Permanent
Elevated Working Platforms for further
Temporary Access Platforms:
Who can construct a temporary
Persons who have received suitable and sufficient
training in the construction of such platforms can construct temporary access
platforms. This will normally be a local scaffold provider unless you have
suitably trained staff internally.
What inspections are required for
completion of erection, a competent person should inspect the scaffold and
common practice is to "scafftag" the scaffold. It should then be inspected at a
frequency of no greater than 7 days with the "scafftag" being re-authorised.
Is there any other time that the
temporary platform should be inspected?
Yes, at each time that an exceptional circumstance
has occurred which may affect the safety integrity of the temporary platform,
e.g. vehicle impact, shock loading, extreme adverse weather etc.
What are the weight specification
requirements for the temporary platform?
platforms should meet minimum weight criteria required for sampling (400kg point
load in BS EN 13284-1:2002). Temporary scaffolds cannot be constructed to this
specification and must, instead, be constructed to a minimum "scafftag" category
of "Heavy Duty".
Are there any other requirements
for temporary platforms?
temporary platforms must be tied to, or supported by, a permanent structure.
elevated working platforms ('cherry-pickers'):
STA guidance note HSGN
1019 Why MEWP are unsuitable for stack testing
Can MCERTS organisation/personnel
use a cherry picker to conduct sampling?
cherry pickers may have been used in the past by the industry, risk assessment
has identified that these are not fit for purpose and not safe. This is based on
the fact that a 'cherry picker' cannot achieve the 400kg point load, the basket
space is too restrictive for the equipment and, by attaching the probe to the
stack emission point, one is effectively attaching the basket to the structure
and preventing a quick means of escape in an emergency.
should be noted that the use of cherry pickers is in contravention of MCERTS
requirements and accreditation or certification can be withdrawn from companies
and/or personnel found to be using cherry pickers to carry of stack sampling.
Fragile Roof Surfaces:
What are the Process Operator's
duties in relation to fragile surfaces?
It is the
duty of the process operator to ensure the health and safety of non-employees
and provide safe access and egress for their place of work. If the stack
penetrates a roof surface and the stack monitoring team is required to transfer
across such surfaces, the process operator must carry our a suitable and
sufficient assessment of the transfer area and provide adequate control measures
to prevent a fall through a fragile surface.
Refer to STA guidance note "WAH002
Working on stacks that penetrate fragile roofs"
for further information.