When a parapet is lower than the safety standards prescribe to safely access a roof, a wall mounted guardrail can provide a larger safe zone. This type of guardrail is either mounted on top or on the inside of the parapet or wall.
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① The minimum vertical height of upright is 1100mm ② The maximum height between handrail and kneerail is 500mm
③ The maximum allowed space between wall and first post is 500mm ④ The maximum allowed space between free end and post is 500mm
⑤ The maxmium allowed span between posts is 1750mm ⑥ The thickness of parapet should be greater than 120mm
*EN14122-3:2016
**EN13374:2013+A1:2018
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