Steel structure workshop is widely used in daily life. In order to ensure that the steel structure workshop brings more convenience to production and life, the following points should be paid attention to in the design of steel structure workshop:
1. Seepage prevention: prevent rainwater from seeping into the metal roof panel from the outside Rainwater mainly enters the metal roof through lap joints or joints To achieve the function of anti-seepage, it is necessary to adopt concealed fixation after using sealing washer at the screw port. The lap joint of the plate shall be treated with sealant or welding. It is best to use a full-length plate to eliminate the lap joint, and the abdominal distension at various nodes shall be treated with tight waterproof treatment
2. Fire prevention: in case of fire, the metal roof material will not burn and the flame will not penetrate the metal roof panel
3. Wind pressure resistance: resist the local maximum wind pressure, and the metal roof panel will not be pulled off by negative wind pressure The wind resistance is related to the fastening force of metal roof panel and fixed seat and the density of fixed seat
4. Sound insulation: prevent sound from passing from outside to inside or from inside to outside The metal roof layer is filled with sound insulation material (usually thermal insulation cotton), and the sound insulation effect is expressed in decibels of sound intensity difference on both sides of the metal roof layer The sound insulation effect is related to the density and thickness of sound insulation materials It should be noted that sound insulation materials have different blocking effects on different frequencies
5. Ventilation: indoor and outdoor air exchange Set vent on metal roof
6. Moisture proof: prevent condensation of water vapor in the metal roof bottom layer and metal roof layer, and discharge the water vapor in the metal roof layer The solution is to fill the metal roof layer with thermal insulation cotton, lay waterproof membrane on the metal roof bottom plate, and have ventilated nodes on the metal roof panel
7. Bearing: bearing construction load, rain, dust, snow pressure and maintenance load The load-bearing performance of metal roof slab is related to the section characteristics of plate type, the strength and thickness of material, the mode of force transmission and the spacing of purlin (auxiliary purlin)
8. Lightning protection: lead the lightning to the ground to prevent the lightning from penetrating the metal roof and entering the room
9. Thermal insulation: prevent heat transfer on both sides of the metal roof to stabilize the indoor temperature The thermal insulation function is realized by filling thermal insulation materials (commonly used glass wool and rock wool) under the metal roof panel. The thermal insulation effect is expressed in U value, and the unit is w / m2k Thermal insulation performance is determined by the following factors: raw material, density and thickness of thermal insulation cotton; Humidity of insulation cotton and connection mode between metal roof panel and substructure (to prevent "cold bridge"; The repeated ability of metal roof layer to heat radiation
10. Daylighting: improve indoor lighting through skylight during the day to save energy The service life of the skylight shall be considered to coordinate with the metal roof panel when arranging the daylighting panel or daylighting glass at the specific position of the metal roof, and the waterproof treatment shall be done at the connection between the skylight and the metal roof panel
11. Aesthetics: the appearance of metal roof has good texture and pleasing color
12. Control thermal expansion and cold contraction: control the contraction displacement and direction of metal roof panel Ensure that the metal roof panel will not be damaged by the stress caused by thermal expansion and cold contraction in areas with large temperature difference
13. Avalanche prevention: set snow barriers on metal roofs in snowy areas to prevent sudden snow fall
14. Icicles: prevent rain and snow from forming icicles at the cornice