1. If there is a gutter, the tie rod cannot be designed to be close to the top of the column, otherwise it may result in the installation of the downpipe. In addition, the position of the gutter downpipe and tie rod and the support between the columns must be considered well, otherwise it will either touch the tie rod or touch the support between the columns.
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Second, the horizontal support on the arrangement of the basket bolt position should be reasonable, do not deviate too much from the main beam, should consider the convenience of installation. Otherwise, the worker must find out the body to tighten the basket bolt or use the ladder when installing, or it is very unsafe to climb the stringer after the installation of the stringer to tighten the basket bolt. Also consider the position of the rafters, do not fight with the rafters when arranging the horizontal supports.
Third, do not consider the factors such as “pused and pressed edges†on the drawstring hole of the purlin, and punch the holes with different top and bottom margins. Because it is easy to install and reverse when installed, the result is unfavorable.
Fourth, the corners of doors and windows, etc. can not be generalized, because in the construction you can not guarantee that the plate is located in the peak or trough of the profiled plate.
5. When doing large-scale projects, the depth of the drawing number must take into account the convenience of production, delivery, and installation.
Sixth, the "load and other data" provided by Party A must understand its true meaning, because Party A often does not understand these too professional stuff. We have to think about empathy, the pre-work is done well, and the follow-up work is much better.
7. The position of the high-strength bolt should be reasonable. The construction space of the torque breaker and the torque wrench should be considered. Do not install it, because the space is too small, the twister and the torque wrench cannot be seated, etc., so that the high-strength bolt can not be twisted. Or high-strength bolts cannot be tightened. I have encountered some designs and even the position of the sleeve is not given.
Eight, high-strength bolt connection plate If possible, try to use the upper and lower symmetrical bolt arrangement method. There used to be six of the top four of the middle joints. The workshop workers accidentally knocked a part of it back and couldn’t get it on the spot.
9. If the light steel structure has a maintenance brick wall, it must be docked with the construction unit and the civil construction unit in advance, because it involves two problems in the civil construction and the steel structure, because the brick wall of the civil construction is likely to be not straight. The flooding of the color steel plate can't be made big or small. The result is that the gap between the color steel plate and the brick wall is too big and small, and it is difficult to do the pan-water treatment of the color steel plate and the brick wall, so that the construction unit has the heart. ready.
Ten, anchor bolts are generally buried in civil construction units, steel structure manufacturers to map, they can sometimes turn the position of the anchor bolts 90 degrees, and so on when reviewing, there is no time to go; there are dimensional deviations to give you an offset 50~100mm is not surprising. Therefore, we must give special reminders before construction. It is best to have a textual basis (self-protection).
XI. The connection between the wind-resistant column and the steel beam should be connected by spring plate as much as possible. Because the beam of the middle span is relatively large after installation, if the beam of the gable is connected with the wind-resistant column, the roof will be uneven.
12. The layout of the roof rafters and the detailed drawings of the steel beams should be carefully checked. It is often found that the layout of the roof rafters and the details of the steel girders are not the same.
Thirteen, the gusset plate has no stiffeners, and some are not designed by the designer, resulting in deformation of the gusset plate during subsequent welding.
14. When the beam and column are used as the tie rod connecting plate, the hole is not properly extended. In some places, because the connecting plate on the tie rod is too long, the space is too small, and the tie rod is too long to fit. This is often the case with some secondary beam structures.
15. When the strip window is made, the stiffener of the pallet is oriented toward the window, so when the strip window goes to the rib, it will not pass. In addition, countersunk screws should be used when installing the purlins with strip windows.
16. The upper strip window on the doorway is too close to the upper frame of the doorway, and there is no awning position.
17. The brace between the upper and lower stiles of the window frame is not arranged, and the end of the brace is in conflict with the window frame.
18. The types of steel plates and high-strength bolts should be as small as possible, and material testing costs should be considered. Especially in the case of off-site construction, some on-site supervisors do not recognize the tests performed by the factory. Are you going to coordinate?
Nineteen, the connecting plate of the purlins should not be designed as a square, and the workshop is easy to reverse the assembly.
20. The inner gutter does not do the insulation layer, and a “cold bridge†is formed inside the room, which causes dripping and condensation. Apply anti-condensation paint under the gutter, or spray polyurethane insulation layer, or do other insulation treatment.
Twenty-one, the roof panel uses a sandwich panel, then it is estimated that within half a year (if the span is slightly larger), it will leak. A check of the outer panel of the roof panel has several flaws, because it does not consider its repeated thermal expansion and contraction under the sun. In fact, you will know what is going on after you finish the construction (when there is a sun) when you go indoors.
Common problems encountered in steel structure design and construction