Glass clamps are indispensable in the world of railings. They are available in many materials, finishes, shapes and sizes and are among our most sold products. Whether you have worked with them before or not, we have some tips and tricks that will show you how to mount glass clamps faster and easier. Here are our answers to the 5 most frequently asked glass clamp questions.
1. How do I calculate the required glass width before mounting glass clamps?
When planning your railing, you need to calculate the width of glass required. First, find out the centre-to-centre post distance, then deduct from that the post width and 2 times the ‘deduction size’ of your clamps (every Q-railing glass clamp has a ‘deduction size’ of 20 mm). So, with a 40x40 mm baluster post and a 1000 mm centre-to-centre post distance, the ideal glass width is 920 mm.
2. Should I really use a different rubber depending on the glass thickness?
Different rubber thicknesses are provided in order to ensure the perfect connection between glass clamp and glass. There are even different rubbers for different numbers of interlayers. If a glass panel fits perfectly, the risk of glass slippage will be eliminated.
3. When do I need to use a security pin or plate?
A security pin or plate can be used in any glass clamp mounting situation. But for fascia mount installations – a so-called ‘hanging glass’ scenario – security pins or plates are a must. The pin or plate will prevent the glass from slipping, for example during a fire.
4. What kind of drill-and-tap method should be used for mounting glass clamps?
Flow-drilled posts have an increased material thickness at the drilling, which makes for a good connection between glass clamp and baluster. All standard pre-drilled baluster posts are flow-drilled. Alternatively, rivet nuts can be used.
5. What Nm is required when screws are fastened?
To create a perfect clamping, the screws on a glass clamp should be tightened to the correct torque. This can be achieved using a torque wrench. The screw that fixes the clamp to the baluster requires 12 Nm. The screws in the glass clamp that hold the glass should be tightened to 8 Nm. In every Q-railing glass clamp box, a manual is included in which the torque settings for all screws are stipulated.
To make sure everything goes perfectly, here is a bonus question.
What should I do if not all the holes are drilled perfectly in line?
Using adjustable screws helps a great deal in this situation as they will give you a tolerance of up to 5 degrees.