Lifting steel beams under the ceiling - how does that work?

Steel girders are used to catch or stabilize ceilings. But because a ceiling is not always flat, there are often gaps. What you can do in this case, and which solutions promise the best success, you will learn in this post.

Problem "air gap"

Each steel beam must be stable on a precisely calculated support when retracted. The support ensures that the support is adequately supported from below and the loads are removed evenly as desired.

In some cases, however, it may happen that the carrier is then stable on the support, but then the ceiling does not touch all or not in all places. Ceilings can very often be uneven, even with the construction of the supports, it may occasionally, depending on the building material to previously unrecognized deviations come.

The resulting gap must be repaired properly in any case, thereby the statics of the entire construction is at risk. The wearer must in any case have full contact with the ceiling so that the loads are removed properly and as planned.

remedy options

The problem can not be solved with "home remedies". As a rule, the responsible structural engineer, who has also planned the carrier, assesses the situation and then prescribes exactly how and with what methods should be used to close the air gap. This can happen in practice in different ways:

  • fill the gap with the swelling concrete
  • (eventually) place steel plates on the carrier
  • lift the carrier by appropriate measures
  • Fill gap from above

Fill gap with swelling concrete (stuffing)

The gap is first cleaned of dust (blow out), then the swelling concrete is introduced and stuffed until the gap is completely filled. During curing, the swelling concrete increases its volume and thus creates a frictional connection with the ceiling over the entire length of the support.

Place steel plates on the carrier

Such a procedure is rarely used because the column width is not always uniform. Thus, even with the steel plates no continuous connection would arise, and the problem would not be resolved.

Lift carrier by appropriate measures

In order to lift a carrier from below (ie from the supports), there are several possible methods. The design depends on the respective support.

Fill gap from above

In some cases it is possible to drill holes through the ceiling and pour the gap and holes from above with liquid concrete. The carrier is turned on until the concrete has hardened.

Tips & Tricks

In any case, the measures to be carried out must be ordered by the structural engineer after a survey of the local situation. This is the only way to ensure that the static looks like it was originally calculated.

Video Board: BIG steel beam lifting job - the single handed DIY method