Before scaffolding.doc

Before scaffolding, should by the construction of homework, head of the team, operations personnel safety technical disclosure. 2, the disclosure shall include frame body set-up procedures and methods and safety considerations. 1.1.1.1 gantry scaffolding, technical requirements 1, the frame body is solid level off, smooth drainage water, door frame pole plate solid, not shake, no settlement, height adjustable base conform to the requirement of specification. 2, the door frame installation requirements set wall piece, and conform to the requirements of the specification. 3, shows up and down the door frame poling axis deviation in accordance with the requirements of the standard and special construction scheme. 4, the frame body should be in accordance with the requirements set even a wall and do conform to the requirements of the specification. 5, bracing set its point of view, according to the requirements of specification counsels and bar lap, should comply with the specification requirements. 6, the frame body horizontal reinforcing bar is set according to the requirements of specification. 7, tight operation layer planking shall be strong. 8, the frame body protection adopting federated eye network, and do not less than 1.5 m higher than construction work layer. 9, buckle fastening torque 40 n, m - 65 n, m. 1.1.1.2 door type scaffold inspection and acceptance 1, before the gantry scaffolding, should frame based inspection body, experienced qualified rear can scaffold erection. 2, gantry scaffolding, or every 2 floor height shall be built, a check should be made for the erection quality and safety experience eligible consign is used, or continue to build. Should also include 3, wearing experience, door frame span, spacing is in line with the requirements. 4, cantilever scaffold cantilever beam is connected to the building structure installation is in accordance with the specification requirements. 5, the frame body protection and the safety net of the sealing, the setting of protective railings conformed to the specification requirements. 6, bad weather or 8 after the winds shall timely inspect the scaffolding. 1.1.2 steel tube fastener frame body 1.1.2.1 scaffolding to choose form and layout The project according to the characters of building design, structure of scaffolding, height and outer wall construction requirements, choose the double row scaffolding, landing operations and security needs. This project outside the scaffold is mainly used for the main body construction phase of the safety and operation of external wall decoration (repair), according to the adornment of scaffold erection of standards. 1.1.2.2 scaffolding materials and requirements (1) the main material of erection of scaffolding used: 48 x 3.25 the quality of the steel tube, even the wall rod should comply with the national standard of carbon structural steel (GB/T700) - A grade steel Q235, fastener materials should comply with the national standard of the steel pipe scaffold fasteners (GB15831) regulation, steel basketry scaffolding, green dense mesh net, rope, and supporting components should comply with the construction fastener steel pipe scaffold safety technical specifications (JGJ130-2001) of the rules. (2) all scaffold pole set protective bars on the lateral and hung dense mesh type safety green nets, bracing should besmear blue paint (or yellow and white color), to ensure that the scaffold looks the same color. (3) the part of the rules for comparing pedestrian ramps should choose exterior Settings, using ground scaffolding, building the pedestrian ramps by ground (floor) surface to the operational layer set up continuously, the pedestrian ramps for the word form, the pedestrian ramps and building or outside the frame connection is firm; Pedestrian ramps set-up, stop inside the buildings set safe passage. 1.1.2.3 landing scaffolding Structure size is as follows: poling throw La = 1.50 1.60 m, poling subtense Lb = 0.85 m, interval h = 1.80 m scaffold poling maximum distance of 1250 mm off the wall, the horizontal spacing wall bar L1 = 3.0 m, the vertical distance between H1 = 4 m, even use 48 x 3.25 steel tube wall bar and end with a right-angle fastener rod connected with the scaffolding inside and outside, the other end connected to the building of embedded steel pipe with fastener; Scaffolding lateral hung green eye safety set net, allow the erection height H 50 m or less. 1.1.2.3.1 erection sequence The basis of the original soil compaction - hardening - play scaffolding installation line - put chock - vertical pole to erect stem, sweeps the floor set behind supports to install transverse rod sweeps the floor, the first step to install putlog shop to install the first longitudinal bar, steel basketry scaffolding to set even wall bar, installation step 2 small rail - step 2 longitudinal bar. 1.1.2.3.2 poling, authors note 1 the butt joint on the vertical bar fasteners should be staggered, two adjacent stud connectors should not be in sync with cross, in the height direction staggered distance should be not less than 500 mm, the joint center distance of the master node distance shall not be greater than 1/3 of the interval. 2 began to take to set up the rod, should every 6 set across a brace, after being even wall bar installation is firm, can according to the situation. 3 when build to have even the part of the wall bar, build-up of the stud finished here and longitudinal rod, lateral horizontal pole, should immediately set even a wall. The top 4 stud should be higher than building eaves epithelial height of 1.5 m. Poling extension can be used in addition to top the top step lap, the rest of the each layer of each step must adopt butt joint fastener connection. 5 scaffold must be set to sweep the floor bar, right-angle fastener should be used vertical sweeping bar fixed on the plate is not more than 200 mm in the vertical pole, transverse rod should be fixed in the close to the vertical sweeping rod sweeps the floor at the bottom of the vertical pole; When stud base is not the same height, the longitudinal rod sweeps the floor must be high to extend to the lower two across and vertical rod is fixed, stand on the slope of the rod to the slope distance should be not less than 500 mm. Set-up lateral horizontal pole 1.1.2.3.3 considerations 1 scaffolding longitudinal rod set on lateral horizontal pole, the spacing shall not be greater than 400 mm, the joint should be staggered, should not be located within a synchronization, with cross, adjacent joint horizontal distance should not be less than 500 mm, and avoid located in longitudinal bar across; Lap joint length shall not be less than 1 m, and shall set up three rotating fastener stationary. Each 2 main node must set a lateral horizontal pole, and USES the right-angle fastener on the stud, scaffolding plane extending length is 200 mm, side against the wall of overhanging length is 250 mm. Longitudinal rod with step 3 enclosed a scaffold must be around the circle, with rectangular fasteners with internal and external Angle rod fixation. 1.1.2.3.4 set even wall bar, bracing, lateral support considerations 1 scaffolding even wall parts should strictly according to the size of the erection requirements in the design of uniform spacing setup, form appropriate USES lozenge arrangement, even the wall should be close to the master node set, the distance of the deviation from the master node should not be greater than 300 mm. 2 even the wall is a must start from the bottom of the first root longitudinal bar set, on the other side of one word, open mouth scaffolding even the wall of the vertical distance must be tall building continuous Settings; Need to disconnect the scaffolding parts in the construction elevator position, should be in the first two state of the longitudinal spacing openings on both ends of the rod at the same time, according to the height setting wall bar, even the wall bar should be set in horizontal and perpendicular to the wall, to connect one end of the scaffold can be slightly inferior oblique, absolutely not allow tilted upward. 3 each bridging across poling number should be between 5 to 7 root, its width should be not less than 6 m, diagonal Angle with the ground should be between 45 to 60 degrees. 4 height under 24 m scaffold, must at opposite ends of the outer facade each set a bracing, and should be from the floor to set up in a row, middle the net distance between each bracing should not be greater than 15 m. Height above 24 m scaffold should be on the outer facade throughout the length and width should be continuous bracing Settings; Bracing diagonal extension of appropriate USES lap, lap length should be not less than 1 m, should use not less than two rotating fastener is fixed, the edge of the end fastener cover plate to the rod end distance should be not less than 100 mm. 5 bracing diagonal application rotary buckle fixed in fellowship with the lateral horizontal pole out side or poling, rotating the dimension from the centerline of the fasteners to the master node should not be greater than 150 mm. 6 a glyph, the ends of the open mouth of scaffolding must set the transverse diagonal, middle appropriate every six across Settings, transverse brace should be set in the same internode, from bottom to top in zigzag arrangement in a row, oblique abdominal rod fixed rotating fasteners should be adopted in the fellowship with the lateral horizontal rod stretched out on the side. 1.1.2.3.5 pedestrian ramps set-up Pedestrian ramps should be attached to the scaffold or on buildings, but ramps bar to independent setting, and USES the word chute, the chute width should not be less than 1 m, slope is 1:3, the turning the platform should be set up and its width should be not less than the width of ramps. Shall set the railing and ramps on both sides and platform periphery foot, rail height should be 1.2 meters, the foot height should not be less than 180 mm, and set up according to the requirements of the scaffold erection of the wall pieces, bracing and lateral brace. 1.1.2.3.6 fastener installation considerations (1) the fastener bolt tightening torque should not be less than 40 nm, is not greater than 65 nm, docking fastener should opening up or portray the bar e