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Frequently Asked Questions — Guide Rails & Brackets
What are the standard guide rail profiles used in elevator installations?
The most common profiles are T-section rails defined by their nominal dimensions (e.g., T45, T50, T70, T89, T114, T127) and flange widths. ISO 7465 and EN 81-20 prescribe dimensional tolerances and surface finish requirements. Selection depends on rated load, car speed, guide shoe type (sliding or roller), and the calculated rail loading from safety gear engagement forces. Turkish suppliers on elevator.tr can assist with profile selection based on your project parameters.
How are guide rail brackets specified?
Rail brackets are specified based on the shaft wall material (concrete, brick, or steel structure), bracket spacing (typically 1.5–2.5 m), and the lateral load capacity required. Brackets must be capable of transferring both static (car weight + load) and dynamic (safety gear engagement) forces to the building structure without exceeding permissible deflections. EN 81-20 Annex G provides calculation methods for rail and bracket sizing.
What surface finish is required for elevator guide rails?
Guide rails for standard sliding guide shoes are supplied with a machined contact face — the flange faces must be ground or milled to achieve the Ra surface roughness and dimensional straightness tolerances specified in ISO 7465. Rails intended for roller guide shoe applications have less stringent surface requirements. Rails should be lightly oiled or greased in service to reduce wear and noise.
Can guide rails be reused during elevator modernization?
Existing guide rails can often be retained during a modernization project if they are in good structural condition, correctly aligned, and dimensionally compatible with the new guide shoe specification. A qualified engineer must assess rail condition — checking for corrosion, deformation at fishplate joints, and compliance with current EN 81-20 straightness tolerances — before confirming reuse.