Lifting Point Placement for Moving Large Steel Frame Units

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Lifting points for a large steel frame should be placed by the fabricator's engineer, based on the frame's center of gravity and stiffness, so the unit stays level and does not twist or buckle during the lift. Always confirm the placement drawing and rigging plan before the crane moves.

Why lifting point placement matters

A large steel frame is often long, slender and heavier at one end than the other. If the lifting points are placed without care, the frame can tilt, twist or bend during the lift, which puts stress on welds and connections and can damage finished surfaces.

Correct placement keeps the unit balanced and stable from the moment it leaves the ground until it is set down. For logistics supervisors, this is the single step that most affects a smooth and safe move.

What determines the right lifting points

The position of the lifting points depends on the frame's weight distribution, its shape and where it is most rigid. The center of gravity is the starting point, but stiffness matters too, because a frame may flex more at unbraced sections.

Overall dimensions and weight
Location of the center of gravity
Stiffness and bracing of the structure
Attachment points already built into the frame

Planning the rigging and crane setup

Once the points are known, the rigging plan defines slings, spreader bars and hook height. The sling angle should be kept reasonable, since steep angles increase the load on each leg and can pull the frame out of shape.

Share the crane's reach and capacity with the fabricator in advance so the plan matches the actual site. A short check before lifting can prevent most problems on the day.

Checks before and during the lift

Before lifting, confirm that the marked points match the drawing and that all slings and shackles are in good condition. Make sure the ground is firm and the access route is clear of people and obstacles.

During the lift, raise the unit slowly and pause to check that it is level. Stop immediately if the frame tilts, creaks or shifts on the slings.

Protecting the finish and the structure

Galvanized or powder-coated surfaces can be scratched by slings and hard contact points. Use protective padding at contact areas and avoid chains directly on finished faces.

Where the frame is designed to be lifted only at specific points, do not use other attachment locations, even if they look convenient on site.

Working with the fabricator

The most reliable method is to request the lifting point drawing together with the production drawings, so the placement is confirmed before manufacturing. Our team can advise on lifting arrangements as part of the project. Standards such as the Israeli railing standard SI 1142 are a general reference, and exact load and sizing values are checked with the engineer for each project.

Frequently asked questions

Who decides where the lifting points go?

The lifting points should be defined by the fabricator's engineer, based on the frame's design, weight distribution and stiffness. The logistics team should follow the approved drawing rather than choose points on site.

Can I lift a frame from any convenient point?

No. Lifting from unplanned points can cause twisting, bending or damage to welds and finishes. Only use the attachment points shown on the lifting drawing.

Why does the frame tilt when lifted?

Tilting usually means the lifting points are not aligned with the center of gravity, or the rigging is uneven. Lower the unit, check the points and rigging, and lift again only once it is level.

What should I send to get a lifting plan?

Send the frame's drawings, dimensions, approximate weight, photos and the crane details if available. This allows the fabricator to recommend suitable lifting points and rigging.

Common mistakes to avoid

The most common mistake is choosing lifting points by eye on site instead of using the engineer's drawing. Ignoring sling angles and skipping the level check before the full lift are also frequent causes of damage.

Our recommendation

Agree on the lifting points and rigging plan with the fabricator before the frame leaves the factory, and mark the attachment points clearly on the unit. Do a short test lift to confirm it is level before the full move.

Summary

Correct lifting point placement keeps large steel frames level, protects their structure and finish, and makes crane transport safer. Confirm the points with the engineer and follow the approved rigging plan.

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