under running overhead cranes on a steel structure

Under running Overhead cranes

The under running overhead crane is suspended from crane runways attached to the ceiling structure of a building.

Under running overhead cranes

 

No ground support for support columns? Are you looking for a solution integrated into the roof of your building for your lifting operations?
Suspended cranes, also known as under running cranes, are specially designed to meet these requirements.
 

 

What is an under running crane?

An under running overhead crane is a lifting device where the crane runs on rails attached directly to the ceiling (or to the building structure), unlike conventional overhead cranes which rest on rails laid on a structure.
 

Technical specifications


  • Lifting capacity: up to ~ 16 metric tons
  • Span: up to ~ 25 meters
  • Lifting height: up to ~ 20 meters
  • Hoist type: chain or wire rope
  • Runway: H- or I-beam fixed to building ceiling
 

Possible configurations :

 
  1. Single girder standard, double girder on request
  2. Straight or flush-mounted connection
  3. Other capacities, spans and lifting heights available on request
Direct connection diagram for a under running overhead crane
STRAIGHT CONNECTION
Flush-mounted connection diagram for a under running overhead crane
FLUSH-MOUNTED

What are the advantages of under running overhead cranes?

 

  1. Ideal when building a freestanding structure is not an option
  2. Generally better lateral approach to the hook
  3. Allows hoists to be transferred from one crane to another, or to a monorail, depending on the configuration.

 

What are the disadvantages of under running overhead cranes?

 

  1. Lifting capacity limited by building structure
  2. Span generally smaller than top running overhead cranes
  3. More frequent maintenance due to ceiling-mounted rails, which can be subjected to building movements. This can lead to rail misalignment.

 

Do you have a project in mind?

 

At Premium Industrial Group, we support you in configuring your overhead crane, with a single objective: to offer you the best lifting solution for safely lifting and moving your equipment.
 
Request a project evaluation by filling out the form by contacting a specialist.
2 under running overhead cranes on a steel structure
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under running overhead crane in Marmen factory
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under running overhead crane in Marble-and-Granite-Castello
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under running overhead crane in a steel shop
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Learning center

Information Center
Whether you're an expert or know nothing about cranes, you'll find everything you need to know HERE.

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Frequently asked questions

01.
In the structural plan, one of the columns encroaches on an emergency exit door. Is this a problem?
A : Yes! No obstructions, fixed installations or turnstiles may encroach on the required width of an emergency exit (National Building Code NBC-2015, article 3.4.3.3).
02.
What distances do I need to respect around an electrical unit for my structural project?
A : A clearance of 1 m in front of an electrical panel is required to ensure safe access for maintenance, inspection and emergency response. (Canadian Electrical Code CEC, Article 2-308).
03.
How can I check if the concrete slab can bear a self-supporting overhead crane structure?
 A : Slab specifications are generally indicated in the quotation from your structural supplier. After validation by the engineer, they will be added to the design plans.

In general, it's up to the owner to check the slab. They can consult their building's construction plans or inspect the existing installation. Premium Industrial Group also offers an accompanying service, including scans or coring of the slab.

The aim is to ensure that the slab meets the engineer's requirements. Please note that this verification does not serve as a certification of capacity. We recommend that you document and archive these analyses.
01

Their ability to listen to our specific needs has been a major strength. They have always responded quickly and efficiently, especially in emergency situations, which has greatly contributed to the continuity and success of our operations. I highly recommend Groupe Industriel Premium to any company looking for a reliable, structured, and responsive partner. Their professionalism and commitment to quality and safety make them a model in the industry.

Jean-Denis Perron
Groupe Picard
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