Installation of steel structure technical tests

Installation of steel structure technical tests

Jiaodi Abstract: Hainan steel component production
Tests, content:
1, Hainan Steel production firstly lofting, cutting and cutting, lofting and cutting should wish to stay in the production of weld shrinkage allowance and cut and installed according to process requirements, planing and milling equality allowance. Before the gas cutting of steel should be cut area of ​​the surface rust, dirt and other clean, clear slag and spatter after gas cutting;
2, the steel surface after correction, there should be a clear concave or damage, scratches depth of not more than 0.5mm. When gas cutting or shearing machine parts, the need for edge processing, the amount of not less than 2.0mm planing
3, in the hole making, precision and tolerance bolt should meet the specification, when the bolt hole tolerances than specification, may not use steel packing block, and can be used after the base metal electrode welding re-match hole-; prior to assembly, parts and components shall be subject to inspection and approval, and connect the contact surface along the edge of each side of the weld 30mm- - within the range of 50mm rust, burrs, dirt, snow, etc. should be cleaned, plates, splice profiles, should prior to assembly; assembly members should be in the parts assembly, welding correction carried out the order of assembly should be determined based on factors such structure, welding method and welding sequence and the like. When using the clamp assembly can not be damaged when removing the jig base material; that the remaining grinding burr should be flat, the top tight contact surfaces should be close to 75% of the area;
4, during welding, the construction unit of its steel, welding materials, welding, post weld heat treatment for the first time used in welding procedure qualification and welding procedure shall be determined based on assessment reports; welding, not use drugs exfoliation or welding welding and flux cored damp caking rusty and the molten solder burnt shell. Wire, solder nail before use to remove oil, rust, welding, welders welding process should abide by, not free arc welding and weld bead on the base material outside the corner of the fillet should be continuous welding around the corner. When fillet cracks, welders are not allowed to deal with, reasons should be identified before treatment fix repair process. Weld renovated the number should not exceed the same place twice. Welding is completed, the welder should clean slag and spatter on both sides of the weld surface, weld appearance quality inspection, after passing the examination shall be marked with the stamp of welders and welding parts prescribed in the process;
5, using the grinding wheel friction surface processing, grinding range of not less than four times the bolt aperture, grinding should be directed perpendicular to the direction of the force member, the friction surface treated, the factory should be granted as anti-slip coefficient test, during transport the specimen shall not damage the friction surface, the friction surface may not have a good handle flash, burrs, weld scar or dirty;
6, Hainan steel before painting should be rust, paint should be uniform, no wrinkling, sagging, should be well attached, after painting is completed, shall be marked with the original number of members on the member, shall be marked with a large member weight, position and location of the center mark.

Jiaodi Abstract: Hainan installation of steel structures
Tests, content:
1, before installation Hainan steel, steel components to deal with quality inspection, deformed steel components, defects should not exceed the allowable deviation measurement and correction of the installation of steel components, should be carried out according to the project characteristics. Welding thick steel and dissimilar steel, high strength bolts to install the main process should be carried out before the installation process test, preparation of the corresponding construction technology.
2, when the expansion of the use of steel assembly unit for installation of easily deformable steel components should be the strength and stability checking, take reinforcement measures when necessary; steel components when using integrated installation, should be divided into several independent units, each unit all steel components after installation, the space unit to be formed of steel.
3, after the steel columns, beams, roof trusses, support, and other major components in place, should be corrected immediately fixed. Day installation of steel components form a stable space system. Installation of steel structures, when the correction should be based on the impact of wind, temperature, sunlight and other external environmental factors such as welding deformation, and take appropriate adjustment measures;
4, the use of other components and equipment installed steel erection, design units should obtain consent and should be checking and take appropriate measures.
5, the top tight design requirements of the node, the contact surface should be close to 70% of the surface. With 0.3mm thick feeler can be inserted into an area no larger than the sum of tight contact with the top 30% of the total area; the edge of the maximum gap should not exceed 0.8mm;
6, the installation of high strength bolts, bolts should be free to penetrate the hole can not be used as a temporary mounting bolts. Installation according to a certain order of high strength bolts tightened should twist outward from the center of the bolt group order, and should be completed in the same day the final twist.

Jiaodi Abstract: Steel Structures Painting
Tests, content:
1, the steel surface before painting should be rust treatment by chemical rust steel surface to be exposed metallic luster, surface treated steel should be no welding slag, burrs, dust, oil, water and burrs without fail Tu, drain coating, the coating should be no rust off and back on.
2, before painting steel surface rust rating shall comply with the design requirements and current national norms,
Brushing should be uniform, no wrinkled skin, flow fall, bubbles and other phenomena, good adhesion, color separation line clear and tidy.

Jiaodi Abstract: safety tests, welders jobs
Tests, content:
1, strictly abide by "the production of basic construction and installation worker safety regulations."
2, welding casing must be well grounded, the power of the assembly and disassembly should electrician;
3, welding machine to set up a separate switch, the switch should be placed inside the gates of the rain, pulling together the lateral operation should wear gloves;
4, welding tongs and the lines must be well insulated, reliable connection, replacement electrodes should wear gloves. Work in wet places, should stand on insulating plastic sheet or wood;
5, is strictly prohibited on the wearing pressure vessel or pipe welding, welding equipment must live off the power.
6, welding store too flammable, explosive, toxic substances containers or pipes, must be cleaned and all openings open;
7, the line, ground rope and prohibiting contact with more mechanical and electrical equipment shall not be used in place of zero or rope line, all the earth connection must be firmly connected;
8, when the replacement site mobile line, cut off the power, and shall not be holding the line ladder, climb;
9, welding slag removal, the use of electric shaver gouging, should wear goggles or face shield to prevent iron slag splashing wounding;
10, when the thunderstorm, you should stop open-air operations;
11, welding around the site should be cleared of explosive materials, or cover, isolation.
End of the work, the welder should be cut off the power and check the operation site, confirmed that before leaving no fire hazard.

Jiaodi Abstract: Paint jobs security tests,
Tests, content:
   Basic provisions painter production safety
1, all kinds of paints and other flammable, toxic materials, should be stored in a dedicated warehouse, can not mix with other materials, volatile paint should be enclosed in a sealed container for safekeeping.
2, the Treasury should be well ventilated, are not allowed to live, and set fire equipment and "No smoking" clearly marked, warehouse and other buildings should be kept a safe distance.
3, with sand-blasting, nozzle joints should be strong, people are not allowed. Nozzle clogging, should be shut down before the repair or replacement eliminate stress;
4, the use of kerosene, gasoline, mineral spirits, acetone, etc. formulated oil, wear protective equipment, non-smoking;
5, paint contaminated cotton, rags, oiled paper and other waste should be collected stored in a covered metal container and timely treatment;
6, in the indoor or spray container, to maintain good ventilation, not allowed to have a job around spraying fire
7, electrostatic spraying, in order to avoid the accumulation of electrostatic spraying room (studio) should be grounded protection device;
8, the brush outside the open sash must be hung on the belt firmly places the brush fascia, downpipes should erection of scaffolding or hanger, at greater than 25 degrees metal roof paint should set the flap ladder, guard railing and safety network.
Use a blowtorch, filling should not be too full, encouragement should not be too full, the use of time should not be too long, burner ignition,, people are not allowed.

Jiaodi Abstract: rigger jobs security tests,
Tests, content:
The basic provisions of (a) production safety rigger
1, the crane driver
A, the driver must be provincial, municipal labor department or a designated training units, but also by professional training schools, no less than six months of training, the training should include basic theoretical knowledge and practical operation of two parts.
B, without the approval of the competent authorities, the driver may not allow non-operating this station crane driver
C, the driver in normal operation, should be subject to wear flag command signal commanding officers, and other persons prohibited blindly
D, the following circumstances are in operation, the driver shall not operate the crane
(1) identify unclear command signal
(2) will cause a dangerous command
(3) does not comply with the command of crane performance
(4) does not comply with the semaphore, gesture, sound command signal specified in GB5082
E, when in operation by more than two commanders, commanding officers to issue only one command signal before the operation can not be operated by two or more of all commanding officers to issue traffic signals at the same time in the whole process of operation, the command must be command staff to operate, is prohibited without a command of the operation, but not allowed to disobey traffic signals, unauthorized operation
2, commanding officers
A, during operation of the crane, you must specify a special command staff, and work under his command
B, commanding officers must undergo special training after passing the examination, and holds a certificate of the competent authorities as commanding officers
C, commanding officers at work, there must be worn in compliance with the provisions of the relevant provisions of GB5082 flag
D, commanders must understand the commanding performance of the crane
E, commanding officers should be in the job GB5144, GB5972 in the relevant regulations, check with the rope hooks, qualified disabled
3, crane operation
Crane by professional drivers to operate in strict accordance with the instructions of the crane operation.

Jiaodi Abstract: Construction trades workers safety tests,
Tests, content:
   Construction and installation of the basic provisions of worker safety in production
1, strict compliance with the relevant provisions of "Jiangsu Province construction and installation works operational requirements"
2, persons engaged in construction and installation of various types of workers must strictly comply with the technical requirements for safe operation, various types of machine operators and other workers should be operating all types of machinery in strict compliance with safety rules and operations of machinery and equipment.
3, to participate in the construction workers (including apprentices, work practice, Daipei staff and workers), be familiar with this type of work safety technical operation, in operation should stick to work, Do not drink and operate;
4, construction and installation workers to the construction site, must wear a helmet and anchored with a cap, forbidden to wear slippers or barefoot, without protective equipment altitude, steep cliff or construction, must wear a seatbelt
5, must be checked machinery, instruments and other tools before work, confirm the safety before use
6, construction machinery, electrical equipment, not sick operation and overload operation found abnormal situation should stop to check, shall not carry out inspection and repair work in the operation;
7, electrical, instrumentation, piping and equipment operation, should be strictly in accordance with the technical measures of individual security, cleaning and repairs are not allowed to operate. Prohibited the head, hand into the machinery range of travel, various types of construction machinery and machine operators should be licensed to operate, and other work-related personnel to operate the equipment and machinery
8, the ladder can not be defective, ladder rung spacing to 750px is appropriate, when using the upper end, a lower end should be put in prison, and the bottom should take measures to slip, the word ladder foot to prison, ladders should be watched at the channel or settings fence, single ladder and the ground angle of 60 to 70 degrees is appropriate, the ladder should be someone under guardianship, prohibit two people on the job ladder, all using the word ladder ladder more than 2m and single high-altitude operations, personnel should wear a helmet, fasten your seat belts.

Jiaodi Abstract: Hainan Steel Pressed metal plate production, installation
Tests, content:
1, pressed metal plate production
Varieties, materials, specifications, and coating appearance quality Pressing sheet metal plate should meet the design requirements: After pressing sheet metal forming the substrate without cracks; plate surface should be clean and free of grease, sediment, large areas should not have obvious irregularities and wrinkles, coating or plating should be no visible cracks, flaking and scratches and other defects.
2, pressed metal plate installation
Pressed metal plate after installation of steel structure should meet the quality inspection and assessment requirements; Pressed metal plate, the water board and the pan angle plate should be fixed and reliable, no loosening, corrosion coatings and sealing material coating installation intact should be connected the number of pieces, spacing meet the design requirements and current national regulations; pressed metal plate appearance should be smooth, straight connection, the board should be free of construction debris and dirt.