Roof panel installation steps of steel structure space frame

1. Check whether the purlins are installed correctly, and whether the steel prefabricated components are sprayed or not;

2. Before installation, according to the layout diagram of corrugated steel plate, classify and stack according to the type and specification. The corrugated steel plate faces upwards, the lap edge faces the installed roof edge, and is placed along the steel roof truss beams and laid manually;

3. The steel structure grid roof panel is laid at the eaves of the roof. In the whole process of installation, the straightness of the cornice line is used as the benchmark, and the positioning of the pull line is checked. The dislocation difference between the ends of the two adjacent panels should not be greater than 8 mm, and the slope of the roof panel is perpendicular to the datum point of the cornice;

4. Start from one side of the roof,put the first piece of roof board installation and location line.Pave the first corrugated steel plate, and fix it with screws after inspection;

5. After the first corrugated steel plate is fixed in place, install the next corrugated steel plate. When installing, place its lap edge on the front corrugated steel plate accurately. In order to ensure the installation position is accurate, clamp it with the previous corrugated steel plate with a tooling fixture, fix both sides of the corrugated steel plate, and then fix it with screws;

6. The length of the longitudinal lap of the corrugated steel plate is not less than 250mm, the lap joint is located at the purlin of the roof, the lap joint is sealed with glue and a row of waterproof rivets, and then fixed with screws;

7. Install the corrugated steel plate in place using the above method. For every 4 pieces of corrugated steel plate installed, check the flatness on both sides of the profiled steel plate. If there is any deviation, adjust it immediately and accurately measure the total width of the fixed profiled steel plate. , measure it once on both the upper and lower sides to ensure that no fan shape appears in the installation part of the corrugated steel plate;

8. After installing a certain number of roof bottom plates, start the installation of roof panel supports, and fix the supports and steel purlins with screws. Then lay insulation cotton, and ensure that the insulation cotton is installed tightly;

9. The installation of the steel structure space frame roof panel is basically the same as that of the thermal insulation cotton. When a piece of thermal insulation cotton is installed, a roof panel is installed. The installation method of the roof panel is the same as that of the roof bottom plate.

Picture from: https://www.safsteelstructure.com/application-center/

Precautions for installation of steel structure space frame in autumn and winter

 1. According to the average temperature specification, the data map of the installation sequence of the steel components is compiled, and the installation is carried out in strict accordance with the sequence during construction.

2. When assembling the space frame components, expand and assemble from the inside to the outside according to the order specified by the process, and do a test to determine the shrinkage value of the weld that needs to be reserved during the assembly at low temperature.

3. When the steel components are made at normal temperature and installed at low temperature, the shrinkage of the components should be fully considered according to the difference in ambient temperature, and technical measures to adjust the deviation should be taken during construction.

4. The columns and main beams installed at negative temperature should be corrected immediately. After the correct position correction, they should be permanently fixed immediately. The components installed on the same day should form a stable space system.

5. When the high-strength bolted joint is installed, the friction surface of the component shall not have snow and ice, and shall not be in contact with dirt, oil and other stolen goods.

6. When using steel cables to hoist steel components, anti-slip spacers should be added, and the gusset plates that are lifted at the same time as the components, and the fixtures and other items that the installer needs to use are securely tied with ropes.

7. When the steel structure space frame is installed on site, it is necessary to build a protective shed in case of rain and snow or when the wind speed is above 6m/s.

Installation steps of the lower chord of the flat steel space frame structure

 1. Familiarize with the drawings before installation, recheck the size and quantity of each component to be installed, and place each component in the order of installation to facilitate the installation of the steel space frame structure.

2. Before installation, check the quality of the threaded fasteners, clean the screw holes and threaded fasteners, and screw them in after they are clean. The high-strength bolts should be tightened in place to ensure that the downward deflection of the entire space frame structure is not affected.

3. According to the numbered positions of the rods and balls on the drawing, install the lower chord balls and rods in the first span to form a longitudinal plane grid, and tighten the high-strength bolts.

4. After installing the support in the first span, align the axis and centerline of the column top. Use a level to correct the elevation if there are errors.

5. Arrange the temporary fulcrums according to the required elevation of the bottom chord to ensure the elevation position of the bottom string.

The temporary fulcrum can be made of on-site scaffold steel pipes, so that the lower chord grid of the first span can pass through the temporary fulcrum.

SAFS Steel Structure Official Website: https://www.safsteelstructure.com/

Picture from: https://www.pinterest.com/songmoon0115/space-frame-structure/