How far can glass railing span?

Editor: View Mate All Glass Railing

• General Provisions on the Application of Civil Building Codes (GB 55031 – 2022): It is stipulated that the glass railing of the over – hanging part of the balcony, outer corridor, indoor corridor, atrium, inner patio, accessible roof and stairs should adopt laminated glass. When the lowest point of the glass railing is not more than 5m from the floor height on one side, the nominal thickness of the toughened laminated glass should not be less than 16.76mm.
• Technical Specification for the Application of Building Glass (JGJ 113 – 2015): For indoor railing glass, when the lowest point of the railing glass is less than 3m from the floor height on one side, toughened glass with a nominal thickness of not less than 12mm or toughened laminated glass with a nominal thickness of not less than 16.76mm should be used. When the height is between 3m and 5m, toughened laminated glass with a nominal thickness of not less than 16.76mm should be used.

• Technical Standard for Building Protection Railings (JGJ/T 470 – 2019): It is specified that the glass used for building protection railings should be laminated glass, and should be edged and chamfered. The edge – grinding should be fine – grinding, and the chamfer width should not be less than 1mm. This standard, together with JGJ 113, restricts the material and processing technology of glass, which also indirectly affects the safe use of glass railing spans.
• Code for Design of Building Structures (GB 50009): It stipulates the horizontal load at the top of the railing. The load acts on the handrail in the middle of the two columns. The maximum relative horizontal displacement value of the guardrail should not be greater than 30mm, the relative deflection of the handrail should not be greater than L/250, and the residual deflection of the handrail should not be greater than L/1000 1 minute after unloading, and there should be no looseness or falling – off. This has a restrictive effect on the span of the glass railing. The larger the span, the greater the deflection of the glass railing under the action of the load, and it must meet the above – mentioned requirements.

In addition, some local standards and industry – specific specifications may also have more detailed regulations on the spans of glass railings. When designing, constructing and accepting glass railings, relevant requirements should be strictly implemented to ensure safety.

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