Steel sandwich safety one of the key of "root", the so-called root is the new steel structure of the mezzanine floor load through the girders, is passed on to the root of the root to the original structure, like a tree without strong root tree can't stand, in the actual construction must first determine whether fixed point bearing structure, the second is the detection of the original structure of hardness, thickness, reinforcement, etc., (non-load-bearing structure or can not meet the original structure construction, need to do independent support, but independent support components also need to do in bearing beams and other components), try not to interrupt the main reinforcement when drilling, strictly in accordance with the depth of the process requirements, diameter of the hole, according to the roof load configuration anchor bolt. The hole must be cleaned up before the anchor bolt is implanted, otherwise the anchoring strength will be seriously affected. During the implantation, the rotation speed should not be too fast, which will cause incomplete drug mixing, and too slow will cause drug running, which will reduce the pulling force. After the implantation, the construction can be carried out according to the temperature and wait time. The production of the embedded plate, the embedded plate is a couple of anchors, according to the total load of the main beam to calculate the thickness and area of the embedded plate (reinforced anchor plate is larger than the high strength bolt anchor plate, to make up for the reason of low success rate of value reinforcement) welding bracket or connecting plate to the mouth welding. When installing, pull experiment should be carried out on the anchor bolt. For the shear force is small, soil experiment can be carried out. When drilling all the embedded boards, the situation of exploring bars should be considered, and more and less can be played, but not less than the design load. If there is a gap between the embedded plate and the concrete beam or column, it can be treated with glue or grouting material. After all the anchor bolts are solidified, the main beam can be loaded.

2. The main girder

Girder in sandwich steel structure engineering is a key to safety in another, if a tree roots again good and trunk can't bear the external force is in vain, the choice of main girder and roofing load-bearing, span is directly related to, if can choose little span beams, or h-beam, steel beam after the chosen polished derusting, cutting, primer, such as processing, After measuring the anchorage at both ends of the site, fine cutting is carried out. Sandwich engineering is different from other steel structure engineering, the length of most beam purlin is variable, so it is cut after measurement. If the span is small, try to use section steel

3. The connection

The construction of steel structure sandwich is mainly the connection of steel beam, 1 welding, 2 high strength bolt connection. Use high-strength bolt connection or welding commonly in big project, because site and welding power supply allow this not to say much, in steel structure interlayer site often is space narrow, main beam is entered hard, after breaking off even outside, enter connection, machine is not used easily, after manual carry carry join together, steel beam is connected in lifting.