Building Occupancy Classes & Glazing sizes

Building Occupancy Classes

Class Occupancy
1 Domestic and Residential ?

Single family dwellings

Office and work areas

Light pedestrian traffic routes

2 Domestic and Residential ?

Multi-occupancy, balconies and edges of roofs

Office and work areas ? areas not susceptible to over-crowding

Areas without obstacles for moving people and not susceptible to over-crowding, stairs, landings, corridors and balconies

3 Areas where people might congregate ?

Areas having fixed seating within 530mm of the barrier

Areas with fixed seating ? restaurants and bars

Areas susceptible to overcrowding ? footways or footpaths less than 3mtrs wide adjacent to sunken areas

Retail areas ? All retail areas including banks, building societies and betting shops

4 Areas Susceptible to over-crowding ?

Theatres, cinemas, shopping malls, assembly areas. Footways or pavements greater than 3mtrs wide adjacent to sunken areas


Design Load Categories

Building Occupancy Class Line Load in kN/m run applied 1100mm above finished floor level UDL in kN/m?applied to the whole infill panel below the line load height Concentrated load in kN applied to any part of the infill panel below the line load height
1 0.36 ?0.50 ?0.25
2 0.74 ?1.00 ?0.50
3 1.50 ?1.50 ?1.50
4 3.00 ?1.50 ?1.50

We therefore advise that areas most associated with private individual purchases fall into Building occupancy class 1 & 2.


When a post system is required.

With a clear factor of safety, 10mm toughened glass will be more than acceptable providing the panel size is no greater than 1200mm between posts.

When our free standing glass system the following is advised.

Building Occupancy Class Thermally Toughened Safety Glass General Base fixed onto concrete

Minimum requirement

Base fixed onto steel

Minimum requirement

With Handrail With Handrail With Handrail
1 12mm 15mm toughened 19mm toughened
2 15mm 19mm toughened 21.5mm rigid laminated, toughened heat soaked
3 19mm x x
4 25mm x x

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