The Installation
time：2017-02-15 07:21:00
The installation demands.
1. We should install the steel grating according to the steel structure. The steel grating would not move horizontally and would not be out of the support frame.
2. The support length on the edge of the steel grating should be more than 25 mm.
3. If we do not need move the steel grating, we should install the steel grating by welding and weld the steel grating on the frame.
4. If we need move or tear down the steel grating after installation, we should install the steel grating with fixing clips.
5. The diameter of the spiral is more than 8 mm.
6. The distance of the installation could be adjusted according to the tolerance. The smallest installation distance of the steel grating should be 3 mm and the smallest installation distance between the steel grating and the structure should be 10 mm.
The installation method.
The welding.
1. We should weld the steel grating on the frame and it could form the permanent connecting.
2. We should clean the galvanized coating, paint, rust, oil and water on the steel grating and the frame.
3. The welding line length should be more than 25 mm and the height of the welding angle should be more than 5 mm.
4. We should remove the slag and splash after welding and paint the zinc rich on the steel grating surface.
Install the fixing clips.
|
Table 1: The fix clips number |
|
The steel grating size |
0.5–1.5 m |
1.5–3.0 m |
3.0–4.0 m |
4.0–5.0 m |
5.0–6.0 m |
|
The fix clips number |
4 |
6 |
8 |
10 |
12 |
The fix clips are the parts which helps to install the steel grating.
1. We should install the fix clips on the frame. There should be 4 sets of fix clips every 1 m2and we should install the fix clips on the four angles.
2. If the steel grating is long and there is support frame in the middle we could install the fix clips according to the table one.
3. The fix clips consist of the upper clip, lower clip, bolt, nut and washer.
4. We should assemble the fix clips like the picture. The lower clip goes through the steel grating and the upper clip is installed on the bearing bar. The lower clip is putted on the support frame. We use the nut to fix a position for the lower clip groove. We should tighten the bolt and the clips should be close to the frame. The tightening torque is 17–20 N·m.
5. When the steel grating is installed on the support frame we should tighten them. We should make sure the steel grating would not move and cause safe problem.
6. After the installation, we should maintain for the steel grating. We should tighten the fix clips in time when the fix clips is loose.
Install the stairs tread.
1. The steel stairs tolerance should be of the design requirements.
2. The height of the stairs tread and its horizontal distance should be positioned according to the demands.
3. We should clean the galvanized coating, paint, rust, oil and water on the stairs tread and the stepping board surface.
4. If there is big gap between the stepping board and the stairs, we should fill it with the thin steel board and weld it. The height of the welding part should be more than 5 mm around the bearing bar.
5. The connecting for the handrail railing.
· We weld the cross bar joint with intermittent welding method and clean the welding slag and rough welding tumor. We should paint the zinc rich on the railing.
· We should move the column to the installation position and place the bar abutment on the middle of the ball. Then we should fix the column.
· If necessary, we should weld out of the ball and clean the welding slag, remove the welding tumor. Finally we should paint the zinc rich on it.
· If there is zinc residue left on the column hole, we should insert a short pipe into the hole and rotate for two or three times. We could also file with a file and we should paint zinc rich when the zinc layer falls off.
· We should adjust the height for the column and install the cross bar into the column.
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