1. If there is a gutter, the tie rod cannot be designed to be close to the top of the column, otherwise it may lead to the inability to install the downpipe. In addition, the location of the gutter downspout and tie rod and inter-column support must be considered, otherwise it will either hit the tie rod or the inter-column support.
Second, the arrangement of the bolt position of the flower basket on the horizontal support should be reasonable, not too far from the main beam, and should be considered to facilitate installation. Otherwise, workers must lean out to tighten the flower basket bolts or climb the ladder to go up during installation, or wait for the purlin installation to climb on the purlin and tighten the flower basket bolts, which is very unsafe. In addition, you should also consider the placement of the corner support, and do not fight with the corner support when arranging the horizontal support.
3. Don’t one-sidedly consider factors such as “tension edge, compression edge” on the string hole of the purlin, and hit the eyelets with unequal upper and lower margins, because it is easy to install it inverted, and the result is unfavorable.
Fourth, the corner plate of doors and windows can not be generalized, because in the construction you can not guarantee that the plate is located at the peak or trough of the profiled plate.
Fifth, when doing large-scale projects, the numbering of the deepening drawing must take into account the convenience of production, delivery and installation.
6. The “load and other data” provided by Party A must understand its true meaning, because Party A often does not understand these too professional things. We must empathize, and if the preliminary work is done well, the follow-up work will be much easier.
7. The position of the high-strength bolt should be reasonable, and the construction space of the torsion breaker and torque wrench should be considered, and the torsion breaker and torque wrench should not be in place during installation, because the space is too small, resulting in the inability to break the plum blossom head of the high-strength bolt or the inability to tighten the high-strength bolt. I have come across some designs that don’t even give the position of the sleeve.
8. If possible, the high-strength bolt connecting plate should be arranged symmetrically as far as possible. There used to be 4 contacts above and 6 below, and the workshop workers accidentally reversed some of them and couldn’t match them on the spot.
Nine, 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 this involves two aspects of civil engineering and steel structure, because the civil brick wall is likely to be uneven, but the flashing of the color steel plate can not be done big and small, the result is that the gap between the color steel plate and the brick wall is large and small, and it is difficult to do a good job when the flashing treatment of the color steel plate and the brick wall, so that the construction unit is prepared.
10. Anchor bolts are generally buried in civil engineering units, steel structure manufacturers make drawings, they can sometimes turn the position of anchor bolts 90 degrees, and when they are reviewed, it is too late; There is also a size deviation to give you an offset of 50~100mm, which is not surprising. Therefore, before construction, it must be specially reminded that it is best to have a written basis for disclosure (self-protection).
11. The connection between the wind-resistant column and the steel beam should be connected by a spring plate as far as possible, because the beam of the middle span is more deflected after installation, and if the beam of the gable is connected with the wind-resistant column with bolts, it will cause the roof to be uneven.
Twelve, the roof purlin layout drawing and the details of the steel beam should be carefully checked, and it is often found that the number of purlins of the roof purlin layout drawing and the detailed drawing of the steel beam does not match.
13. There is no stiffener in the gusset plate, and some designers have not designed it, resulting in the deformation of the gusset plate during subsequent welding.
14. When the beam and column are made as the tie rod connecting plate, the hole is not properly extended, and 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 put in. This is often the case with some secondary beam structures.
15. When making a strip window, the purlin plate stiffener is facing the direction of the window, so when the strip window walks to this rib, it can’t go over. In addition, when installing purlins with strip windows, countersunk screws should be used as much as possible.
16. The upper strip window of the door is too close to the upper frame of the door, and there is no place for the awning.
17. The strip between the adjacent purlins above and below the window frame is not arranged, and the end of the strip conflicts with the window frame.
18. The types of steel plates and high-strength bolts should be as few as possible, and the cost of material testing should be considered. Especially when working in different places, some on-site supervisors do not recognize the tests done by the factory. You’re going to coordinate, right?
19. The connecting plate of the purlin should not be designed as a square as much as possible, and the workshop is easy to reverse the assembly.
20. The inner gutter does not make an insulation layer, and a “cold bridge” is formed indoors, resulting in dripping and condensation. Anti-condensation paint should be applied under the gutter, or polyurethane insulation should be sprayed, and other insulation treatments can also be done.
21. The roof panel adopts a sandwich plate, so it is estimated that it will leak within half a year (if the span is slightly larger). A check shows that there are several fractures in the outer slab of the roof panel, because it does not take into account its repeated thermal expansion and contraction under the sun. Actually, after the construction is finished (when there is sun), you will know what is going on when you go indoors and listen to it.
Common problems encountered in the design and construction of steel structures
