Semi-Freestanding Runway

Semi-Freestanding Runway. When a new or existing building has enough reserve capacity to resist the longitudinal (along the length of the crane runway) and lateral (across the width of the runway) forces, Service Crane can attach the columns and runways to these buildings, reducing the amount of steel required to produce an overhead crane system. These systems are good where the requirement is for minimum floor obstructions and where maximum headroom (hook height) is required. Engineering services are available through Service Craneks to help you determine if your building has the required strength to utilize a money saving semi-freestanding crane runway system.

A main component of a semi-freestanding overhead traveling crane system is a top running single or double girder bridge crane designed with the bridge on the top of the runway. The crane runway is positioned on self-supporting columns.


  • Capacities vary from 1 to 50 ton
  • Available in unlimited lengths
  • Columns fasten directly in to a 6 inch concrete floor or adequately sized foundation
  • Push, motor driven, and hand geared bridge cranes available
  • Custom engineered to meet your building specifications
  • Ships complete with:
    • Runway electrification
    • Assembly manual
    • Hardware
    • Anchor bolts (if required)
  • Comprehensive approval drawings supplied in Auto CAD format
  • AISC specified runway systems
  • Custom explosion proof and food grade systems are offered
  • Licensed engineers review all system designs

Cranes Sharing the Same Runway

For greatest use and versatility of a work area and to safely manipulate heavy loads of the same or different capacities on the same runway you can use two or more overhead cranes of different capacities and share the same runway. As an example a 10 Ton runway system can be used to support two 5-Ton cranes with no restrictions to the distance between the cranes.

A 5 Ton crane runway could just as easily be used to lift 10 Tons as long as it is equipped with two 5 Ton cranes and they are separated by enough distance thorough mechanical separation (buffers) or electronically with distance sensing devices to keep the cranes separated.

Other options are available when an application requires load monitoring to protect runways from overload but when versatility of the system is needed including: Load limiting switches, temporary end stops and bridge travel limit switches. Load scaling for monitoring and limiting combined loads form overloading a runway system are one of the modern options that are available today.