Brief description of what is the danger source of the squad leader
Scaffolding in the structure, vertical and horizontal vertical scissors, even wall pieces, horizontal scissors support, vertical pole, horizontal spacing, horizontal bar step, steel pipe connection, fasteners, pole base, vertical, sweeping the ground, etc , JGJ130-2011 "construction of fasteners steel scaffold safety technical specifications" on the complete provisions In addition to meet the structural requirements, the calculation of the body of the frame must meet the requirements
The two kinds of sheet metal forming process is not the same Polyphenylene plate is made of volatile liquid blowing agent of the polystyrene beads, after heating preheated in the mold after heating with a fine closed-cell structure. Breaking the look will be a grain of grain. Usually white extruded plate It is made of polystyrene resin and other additives by extrusion process has a continuous uniform surface and closed-cell honeycomb structure of the plate. More brittle, but also deformation. All kinds of colors are, because the manufacturers in order to distinguish between their own brand to add something.
(EPS) or extruded board (XPS), which is made of polymer mortar, fiberglass mesh, flame retardant molded polystyrene foam board (EPS) or extruded board (XPS), etc
