| Definition | Metal mounting cylinders, also called standoffs or glass spigots | They hold a glass panel away from a wall, fascia, stair stringer, or other supporting structure. | Choose a system designed specifically for structural glass railing use rather than general decorative hardware. |
| Glass type | Tempered, laminated, or tempered-laminated safety glass | The glass construction affects safety, thickness, drilling requirements, and how the panel behaves if damaged. | Use safety glazing appropriate for the application and confirm whether the standoff system is compatible with laminated glass. |
| Common glass thickness | 10 mm, 12 mm, 13.5 mm, 15 mm, or 19 mm | Thickness is normally specified in millimetres and must match the hardware opening and gasket system. | Measure the actual glass specification before ordering. Do not force a panel into an undersized opening. |
| Standoff diameter | Approximately 38–50 mm for many railing applications | The diameter is the visible round face of the standoff and contributes to the appearance and bearing area. | Select a diameter that is approved for the panel thickness and required design load; a larger face is not automatically stronger. |
| Projection from support | Approximately 25–50 mm, depending on the system | Projection determines the clearance between the glass and the supporting surface. | Use the shortest projection that provides the required clearance, drainage, cleaning access, and edge protection. |
| Material | Stainless steel, commonly 304 or 316 grade | Material affects corrosion resistance, strength, maintenance, and suitability for indoor or outdoor exposure. | Use 316 stainless steel for coastal, marine, poolside, or high-chloride environments where greater corrosion resistance is needed. |
| Surface finish | Satin/brushed, polished, or powder-coated finish | Finish controls appearance and can influence how visible fingerprints, water spots, and scratches are. | Choose a finish compatible with the environment and clean it according to the material supplier’s instructions. |
| Mounting surface | Concrete, structural steel, timber, masonry, or engineered framing | The support must transfer the railing loads safely to the building structure. | Identify the substrate before selecting anchors. Surface finishes, cladding, and nonstructural sheathing should not be treated as the primary support. |
| Anchor type | Through-bolts, expansion anchors, chemical anchors, or structural screws | The anchor transfers tension, shear, and overturning forces from the standoff to the structure. | Select anchors based on the substrate, edge distance, embedment depth, corrosion exposure, and verified load requirements. |
| Glass connection | Pre-drilled hole with sleeves, gaskets, washers, and caps | The glass is clamped or supported through prepared holes while soft components isolate the glass from metal. | Use the specified hole diameter, edge distance, gasket material, and tightening procedure. Never drill or modify tempered glass on site. |
| Hole location | Determined by panel size, standoff diameter, edge distance, and structural design | Incorrect hole placement can increase glass stress and reduce the effective panel capacity. | Provide the fabricator with a dimensioned drawing before glass production and follow the approved system details. |
| Standoff spacing | Project-specific; often arranged at panel corners and intermediate points | Spacing affects panel deflection, fastener forces, hole stresses, and the amount of hardware visible. | Do not select spacing from appearance alone. Have the panel dimensions, glass build-up, loads, and support conditions checked together. |
| Handrail requirement | Top rail, cap rail, or approved frameless configuration | Some locations require a graspable handrail or top rail independently of the glass support method. | Check local building regulations for handrail height, continuity, graspability, opening limits, and impact-safety requirements. |
| Indoor or outdoor use | Interior, exterior, poolside, marine, or industrial environment | Moisture, salt, cleaning chemicals, temperature changes, and pollutants influence service life. | Match the stainless-steel grade, finish, fasteners, sealants, and maintenance plan to the exposure conditions. |
| Compliance and engineering | Local building code, structural calculations, product test data, and installation instructions | Railing design may need to resist concentrated loads, uniform loads, impact, wind, and other project-specific actions. | Confirm the complete assembly with a qualified designer or engineer before fabrication and installation. Hardware alone does not establish compliance. |