WS single girder overhead crane

What it is

A single girder overhead crane runs on the runway beams of a building with one main girder between two end carriages. The hoist travels on the bottom flange of the girder (underhung trolley), or a low-headroom hoist is used where the building height is limited. It is the economical choice for workshops, warehouses, maintenance bays and production lines with light to medium duty.

The girder is a rolled I-section for short spans, or a welded box or box + I section built in our structural steel plant for longer spans – see built-up steel members.

Crane types: single girder, double girder, gantry, semi-gantry, jib, monorail — WS crane types.

Structure

Main parts of an overhead crane: runway, rails, end carriages, girders, hoist, conductors and controls.

Runway beam – Hot-rolled or built-up steel section
Crane rail – Railway rail, square bar or flat rail
End carriage – Channel or box section with buffers at both ends
Main girder – Single or double; box, I or box + I by span and capacity
Hoist – Electric wire rope hoist – lift, lower, cross travel
Cross travel rail – On the girder top (double girder)
Cross conductor – Festoon cable or conductor rail
Long travel conductor – Enclosed safety conductor rail

Duty group

Vietnam: cranes are designed, manufactured and inspected to TCVN 4244:2005 and the lifting-equipment safety regulation QCVN 07:2012/BLĐTBXH, with technical inspection before use.

Normas e requisitos por mercado

Normas segundo as quais a World Steel projeta, fabrica e documenta este produto – e os principais requisitos geométricos e de carga em cada mercado.

Estados Unidos

CMAA 70 / CMAA 74Top-running and single girder crane specifications
ASME B30.2 · B30.17Overhead and gantry cranes – safety
ASME B30.16 · ASME HST-4Overhead hoists
OSHA 1910.179Overhead and gantry cranes

Load test: 125 % of rated load (ASME B30.2)

Todas as normas United States →

Austrália / NZ

AS 1418.1Cranes – general requirements
AS 1418.18Crane runways and monorails
AS 2550.1Cranes – safe use
AS 4100 · AS/NZS 1554.1Steel design and welding

Registration: Design and item registration per state WHS rules

Todas as normas Australia & New Zealand →

Europa

EN 15011Bridge and gantry cranes
EN 14492-2Power-driven hoists
EN 13001 seriesCrane design – general, actions, limit states
Machinery DirectiveCE marking of the complete crane

Load test: Static 125 % and dynamic 110 % per EN 15011 / EN 14492-2

Todas as normas Europe →

Resumo apenas para orientação – prevalecem a especificação do projeto, a edição da norma adotada e a autoridade competente.

Acabamento	Normas / observações
Paint	Blast cleaned, epoxy primer + polyurethane topcoat in safety yellow or project colour
Marking	Rated capacity and safety slogans on the girder in the client's language
Environment	Tropical, cold, high-temperature or chemical execution for hoists

Acabamento

Normas / observações

Paint

Blast cleaned, epoxy primer + polyurethane topcoat in safety yellow or project colour

Marking

Rated capacity and safety slogans on the girder in the client's language

Environment

Tropical, cold, high-temperature or chemical execution for hoists

Perguntas frequentes

When is a single girder crane enough?

For capacities up to about 20 t and moderate spans and duty. Above that, or when maximum hook height is needed, a double girder crane is usually better.

Do you supply the runway beams?

Yes – runway beams, rails, brackets and the building can be supplied by World Steel as one package.

Especificações

Capacity

1–20 t typical

Span

to about 30 m

Girder

Rolled I, welded box or box + I

Hoist

Electric wire rope hoist, single-rail trolley, standard or low headroom

Speeds

Lifting per hoist table; travel 20/5 m/min standard, inverter optional

Control

Pendant 6-button or radio remote

Power

3-phase 400 V / 50 Hz standard

Duty

FEM 1Am–3m · ISO M4–M6

Documentos fornecidos

General arrangement, girder and runway load drawings

Calculation of girder, end carriages and wheel loads

Mill certificates for girder and end carriage steel

Weld inspection and NDT records

Hoist and component certificates, wiring diagrams

Factory function test, site static and dynamic load test reports

Operation and maintenance manual, spare parts list

Para uma cotação, envie-nos

Capacity, span, lifting height and hook approach

Duty group (FEM / ISO, CMAA or AS 1418)

Building drawings: runway level, column grid, clearances

Speeds, control (pendant / radio) and power supply

Indoor or outdoor, temperature, dust or corrosive environment

Destination code and inspection authority

Solicitar cotação

WS single girder overhead crane

What it is

Structure

Duty group