Abstract
The proposed device is referred to building sphere. Its oriented to strengthening of reinforced concrete hollow fl oor slab, damaged due to diff erent reasons including fi re or technological accident. Possible results of this device using are: signifi cant increase of strength and rigidity of fl oor slabs; signifi cant increase of real fi re-resistance of slabs; smooth unloading of damaged slab; regulation of unloading amount of reinforced slab. This proposed device is simple in design, its characterized by economy in using, negligeable restraint of operating envelope in altitude. Strengthening of reinforced fl oor slab does not require starting dimensions changes; steel is economize in mass and cut because of more strength reinforcement rods. Labor is saving.
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