In brick buildings to the device of interfloor overlappings apply the ferro-concrete multihollow panels leaning on longitudinal external, and internal walls. In other designs of buildings crossbars (runs) on which stack plates of overlappings are basic.
Crossbars (runs) opirajut on ferro-concrete pillows 1 (fig. 142, and, closed up in brick walls or stacked on brick columns on a laying course. Basic pillows establish so that the difference in marks of their top within house section was no more 10мм.
a Fig. 142. Installation of a crossbar (run) :
And - on a wall, - on a column; 1 - a ferro-concrete pillow, 2 - runs
Prior to the beginning of installation of crossbars (runs) verify a level horizontal position of basic pillows. Crossbars stropujut for two loops, submit to an installation site and lower on bed from a solution, outspread on support. Crossbars lead up to design position assembly lomikami. However to move a crossbar it is possible only for perpendicularly longitudinal axis of run, working as a paw lomika. Stability of walls or columns against which the crossbar leans Otherwise can be broken. A workplace of assemblers - on inventory podmostjah. After horizontal position adjustment (on level and vising on earlier established crossbars) and vertical position (on a plumb) the crossbar krepjat to earlier established designs (a way of fastening specify in the project) and then is removed by slings.
Overlapping Panels. In brick and krupnoblochnyh buildings installation of panels of overlappings begin after all elements of external and internal walls within a floor or zahvatki will be erected to a design mark.
Prior to the beginning of installation of overlappings check position of the top basic parts of a laying and runs which should be in one plane (fig. 143): the difference in marks within a floor should not exceed 15мм.
a Fig. 143. Preparation of a basic surface for plates of interfloor overlapping :
And - stropovka, - packing on walls, in - rihtovka, g - the minimum size of a platform opiranija plates;
1 - podmosti, 2 - a box with a solution, 3 - rastvornaja bed, 4 - flexible level
It is necessary to provide horizontal position of a ceiling, obrazuemogo overlappings. For this purpose it is possible to use following reception. In limits zahvatki building (sections) on perimetre of top of walls or runs by means of a level or flexible level put (on in advance fixed rejki) the risks corresponding to assembly horizon, i.e. To a mark on which there will be a bottom of designs of overlappings. Then on nivelirovochnym to marks (on a cord-prichalke) stack levelling layer of a solution (coupler), level a solution a rule and after the coupler gets 50 % durabilities, is mounted by plates (panel) of overlappings, spreading on basic surfaces a layer of a fresh solution in the thickness 3... 4мм. Other way consists that at levelling of basic surfaces marks of average assembly horizon on rejki put, the buildings established on perimetre through everyone 5... 6м. Thus recognise that rastvornye seams should be the least thickness. During installation of plates pull a cord-prichalku and on it it is direct under mounted plates spread rastvornuju bed so that the bed surface was on 2... 3мм above a cord.
Installation of panels begin from face walls, thus the workplace of assemblers is on inventory podmostjah (little tables), and the subsequent panels stack on earlier laid designs.
Overlapping mounts a link from four persons: the machinist of the crane, two assemblers (4th and 3rd categories) and the scaffold worker (3rd category), the Scaffold worker selects panels, stropuet them chetyrehvetvevym a sling and gives signals at lifting. Two assemblers are on overlapping (in the beginning on podmostjah), settling down on one at each support of the mounted panel (fig. 144). Assemblers accept the panel submitted the crane, develop it and direct at lowering to design position. Small to a recursor of the panel assemblers do lomikami before removal a sling. However to move panels in a direction, perpendicular to walls, it is inadmissible. Therefore, before to lower the panel, it precisely direct to receive a basic platform of the demanded width. After packing of each panel check horizontal position of a ceiling vising on its plane; and if necessary and a rule. If it will be found out that planes established and adjacent panels do not coincide with it more than on 4мм, the panel lift the crane, correct rastvornuju bed and establish anew.
a Fig. 144. Installation of panels (plates) of overlapping :
1 - chetyrehvetvevoj a sling, 2 - rastvornaja bed, 3 - a stacked plate
Panels of overlappings after adjustment fix according to instructions in working drawings: assembly loops of panels weld on the anchors which have been closed up at a laying of a wall, adjacent panels fasten among themselves anchors for assembly loops. Longitudinal seams (joints) between panels close up a solution, is dense zachekanivaja it a seam on all depth (fig. 145). Joints of panels of overlapping with walls close up after overlapping installation.
a Fig. 145. Installation of anchors and zadelka joints :
1 - "К-юсЁрчэ№щ" an anchor put in a laying, 2 - welding of steel communications, 3 - the seams which have been closed up by solution М-100, 4 - a box with a solution, 5 - the seams which have been not closed up by a solution
In hollow floorings at opiranii them on external walls necessarily close up emptiness easy concrete or ready concrete stoppers on depth not less 120мм. It do for the purpose of a thermal protection that in places opiranija overlappings walls in the winter were not chilled. As close up heavy concrete or emptiness loose leaves in the panels leaning against internal bearing walls, since the third overlapping from top of buildings and more low. Such zadelka it is necessary for protection of basic parts of hollow floorings of overlappings from destruction under the pressure of overlying designs. Instructions about zadelke emptiness usually give in projects.