Manifestation for glass safety – How getting it wrong could be costly!!

large glass panes waiting for safety manifestation

I had so much fun growing up as a child. Always outside playing come rain or shine. Hurling snow balls at anyone or anything that moved, and playing with water pistols during the scorching summer days. I could never wait for the next day to arrive so we could spend all day playing in the garden or out in the street.

I remember one particular event, that ironically, has got a direct link into what I do now for a living. I decided that for some reason or other, I was going to walk straight through a glass patio door that wasn’t open. I wasn’t seriously hurt, but had a banging headache for the rest of the day, and more than anything, a bruised ego!!

Some people are not so lucky, as the next newspaper article will now demonstrate. Please click EDP Glass Accident Report 1997 – Copy to view article.

In 1992, the H&S regulations were changed to encompass safety manifestation for glass to show where, and I quote from the attached Document K on page 38, “a permanent means of indicating the presence of large uninterrupted areas of transparent glazing”. These regulations were first set out in Approved Document N of the Building Regulations 1992, but have since been updated to appear in Approved Document K 2013 on pages 38 – 40.

The changes between Document N & K are very few, but one stands out a mile. Document K insists that 2 lines of manifestation are to be used at separate heights from the finished floor level where Document N just required the 1 line. It also stipulates, that where a fully glazed door is installed as part of a “glazed screen”, the manifestation has to clearly indicate where the door is. This would have stopped the doctor in the EDP article above, walking into what he believed to be the showroom exit door and suffered what resulted in life changing injuries. Document K, page 39, 7.4 (d,e) shows how this can be achieved. Yet, more times than not, the glass safety manifestation is not done correctly.

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