Stropovka is a time connection of mounted designs with a hook of the load-lifting car.
Before zastropovat a detail, the assembler selects gruzozahvatnye the devices corresponding to weight and character of cargo, and suspends them on a crane hook; gruzozahvatnye devices are used only by what are intended for the given cargo (element). Then the assembler is convinced that the detail freely costs on linings or the basis; the frozen details shift a breakage. The crane in this case can be used only for podderzhivanija high details from overturning.
The Majority of concrete and ferro-concrete details stropujut for the assembly loops which have been closed up in a detail. The hook of the elevating device should come into a loop pharynx freely. Hooks get from an outer side of a detail towards its centre of gravity. Otherwise the safety lock of a hook at detail lifting can fall in a hook. The elevating adaptation krepjat for all loops provided for lifting in corresponding position. Not used for zatsepki cargo the ends the assembler is a lot of-vetvevogo sling strengthens so that at moving of cargo by the crane these ends did not touch subjects meeting on a way. At correctly picked up sling the corner between its branches at lifting of loads should not exceed 90°. The slinger is guided by following rules; it is impossible to use gruzozahvatnym the device if it is faulty; it is forbidden to repair faulty devices independently.
The Most widespread gruzozahvatnye devices - slings, traverses.
Slings produce from the steel rope closed in a ring or forming a loop. On slings cargo suspend to hooks, traverses.
Usually apply slings universal, facilitated, mnogovetvevye.
Universal a sling (fig. 125, is the closed loop from the rope piece which ends are connected zapletkoj 1 or szhimami.
Facilitated a sling (fig. 125, consists of the rope piece which ends are supplied koushami 2. To kousham krepjat hooks 3 or carbines 4 and then the facilitated sling can be used as a branch mnogovetvevogo a sling (fig. 125,).
Mnogovetve vye slings happen two - four - and shestivetvevye. With the help dvuhvetvevogo a sling (fig. 125,) elements with two assembly loops (lift runs, blocks, beams).
Chetyrehvetvevoj a sling (spider) (fig. 125, is intended for installation of plates of overlappings, ladder marches and other elements having four assembly loops. The sling consists of a ring-skoby 5 which, hang on a crane hook, and two pairs the invested slings - branches.
a Fig. 125. Gruzozahvatnye adaptations :
And - a universal sling, - the facilitated sling, in - schemes are viscous a universal sling, g - dvuhvetvevoj, d - chetyrehvetvevoj slings;
1 - zapletka, 2 - koush, 3 - a hook, 4 - a carbine, 5 - a ring-skoba
Traverses represent a metal beam or a farm with devices for capture of mounted elements. Traverses lift elements of the big sizes. At stropovke by flexible slings bolsherazmernyh elements (panels, plates of coverings of the big length) the considerable part of useful height of lifting of a hook of the assembly crane is not used. Traverses also use for lifting of elements which cannot perceive the assembly compressing efforts arising at stropovke by a flexible sling. In quality zahvatnyh devices, a traverse, flexible suspension brackets with hooks or carbines on the ends or kleshchevye and other captures use. On fig. 126 it is shown balochnaja a traverse for lifting of panel partitions (gipsobetonnyh, vibrokirpichnyh, gipsoshlakovyh). A traverse it is suspended to a crane hook dvuhvetvevym by a sling for rings. On a beam 2 mobile blocks 3, in which zapasovany slings-suspension brackets 4 are fixed. Blocks fix clamps 5 in any place of a beam that allows at stropovke to the panel for loops to transfer to them only vertical loading.
a Fig. 126. Balochnaja a traverse for lifting of panel partitions :
1 - stropochnoe a ring, 2 - a beam, 3 - mobile blocks, 4 - suspension bracket slings, 5 - clamps