A method of securing at least one scaffolding floor (44) of scaffolding (20) against lifting out of one or more suspension hooks (32), which are arranged at an end (66) of the at least one scaffolding floor (44), from a U profile (31) of a U-section beam (24), wherein the outwardly open U profile (31) of the U-section beam (24), which extends along the U-section beam longitudinal axis (34), has support limbs (33.1, 33.2), which are arranged parallel to one another and parallel to a longitudinal center plane (49) of the U profile (31) and are connected together by a transverse wall (38) and which have support edges (50.1, 50.2) for laying-on of the suspension hook (32) or the suspension hooks (32) of the at least one scaffolding floor (44),
- and wherein the U-section beam (24) has a guiding and fastening groove (51), which is bounded by the transverse wall (38) and is open in the direction of the support edges (50.1, 50.2) of the support limbs (33.1, 33.2) as well as towards inner sides of the two support limbs and which extends in a transverse direction transversely to the support limbs (33.1, 33.2) and, with formation of a longitudinal slot (55), is bounded by groove engagement-behind webs (53.1, 53.2), which are arranged along the inner sides of the two support limbs (33.1, 33.2) and extend respectively inwardly therefrom and which bound a locking space (56) of the guiding and fastening groove (51), in which a locking body (74.1, 74.2) can be releasably arranged at several positions along the guiding and fastening groove (51),
- wherein in a first method step the suspension hook or hooks (32) of the at least one scaffolding floor (44) is or are detachably laid on at least one support edge (50.1, 50.2) of the support edges (50.1, 50.2) of the support limbs (33.1, 33.2) of the U profile (31) of the U-section beam (24),
- wherein in a succeeding second method step
- at least one anti-lift-out device (70.2, 70.2),
- which includes an anti-lift-out body (67) and a fastening device (71.1, 71.2), which comprises a fastening body (73.1, 73.2), the locking body (74.1, 74.2) and a securing body (75.1, 75.2), wherein the fastening body (73.1, 73.2) extends in the direction of the fastening body longitudinal axis (76.1, 76.2) transversely or perpendicularly to the anti-lift-out body (67) and wherein the securing body (75.1, 75.2) is arranged at the fastening body (73.1, 73.2) at a spacing (78.1, 78.2) from the locking body (74.1, 74.2) and wherein the locking body (74.1, 74.2) is fastened to the fasting body (73.1, 73.2) and extends in the direction of the locking body longitudinal axis (77.1, 77.2) transversely or perpendicularly to the fastening body longitudinal axis (76.1, 76.2) of the fastening body (73.1, 73.2),
- is mounted in such a way
- that the anti-lift-out body (67) engages over the suspension hook or hooks (32) of the at least one scaffolding floor (44) and is detachably fastened by means of the securing body (75.1, 75.2) by way of the fastening body (73.1, 73.2) and the locking body (74.1, 74.2) to the U-section beam (24) in such a way that the suspension hook or hooks (32) is or are secured against lifting in a direction transverse or perpendicular to the U-section beam longitudinal axis (34) out of the U profile (31),
- wherein during performance of the second method step the locking body (74.1, 74.2) is transferred into an insertion setting (99.2) in which it is inserted in a direction transverse or perpendicular to the longitudinal axis (52) of the guiding and fastening groove (51) towards the transverse wall (38) through the longitudinal slot (55) into the guiding and fastening groove (51), wherein the locking body (74.1, 74.2) is then disposed in an unlocking setting (98.1, 98.2),
- after which the locking body (74.1, 74.2) is rotated by means of or by way of the fastening body (73.1, 73.2) about the fastening body longitudinal axis (76.1, 76.2) relative to the U profile (31) in the guiding and fastening groove (51) until in a locking setting (98.1, 98.2) in which the locking body (74.1, 74.2) engages behind the groove engagement-behind webs (53.1, 53.2) of the guiding and fastening groove (51) and in which it is releasably fastened in the locking space (56) of the guiding and fastening groove (51),
- wherein
- during performance of the second method step
- an anti-lift-out and support body (60) which includes the anti-lift-out body (67), which extends in the direction of the anti-lift-out body longitudinal axis (68), and a support body (59.1, 59.2, 59.3), which is fixedly or rigidly connected with the anti-lift-out body (67) and extends transversely or perpendicularly away from the anti-lift-out body (67) up to the support body end (79.1, 79.2.1, 79.2.2, 79.2.3, 79.3), is so arranged that the support body end (79.1, 79.2.1, 79.2.2, 79.2.3, 79.3) of the support body (59.1, 59.2, 59.3) is supported on the transverse wall (38) of the U-section beam (24)
- and the locking body (74.1, 74.2) is inserted by means of or by way of the fastening body (73.1, 73.2) in the direction of the fastening body longitudinal axis (76.1, 76.2) as well as transversely or perpendicularly to the longitudinal axis (52) of the guiding and fastening groove (51) through a passage opening (81.1, 81.2) of the anti-lift-out body (67) of the anti-lift-out and support body (60) and subsequently is inserted by means of or by way of the fastening body (73.1, 73.2) in the direction of the fastening body longitudinal axis (76.1, 76.2) as well as transversely or perpendicularly to the longitudinal axis (52) of the guiding and fastening groove (51) through the longitudinal slot (55) into the guiding and fastening groove (51), wherein then the locking body (74.1, 74.2) is disposed in the unlocking setting (98.1, 98.2), after which the locking body (74.1, 74.2) by means of or by way of the fastening body (73.1, 73.2) is rotated about the fastening body longitudinal axis (76.1, 76.2) relative to the U profile (31) into the locking setting (97.1, 97.2).