48 acceptance criteria A-1: materials shall be 100% visually inspected according to the current national standards, all scaffold materials shall be identified as qualified products after passing the inspection, and shall be properly kept with product quality certificate, production license and test report of professional testing unit
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A-2 safety protection equipment and measurement equipment are complete
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A-3 after the special construction scheme for scaffold erection declared by the general contractor to Party A’s project department is passed, the construction unit shall be organized to carry out technical disclosure and make written disclosure records
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A-4 therefore, scaffold operators must work with certificates
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A-5 drawing deepening: check with the building construction drawing according to the special scheme drawing of scaffold erection, calculate the step distance and transverse distance of the vertical pole, and draw the setting out and positioning drawing of the vertical pole and the layout drawing of the cantilever steel beam of the cantilever unloading layer
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A-6 foundation requirements: adopt concrete hardening treatment, concrete thickness ≥ 100 mm, concrete grade ≥ C20, must meet the load requirements of scaffold erection construction scheme, and set out according to the pole setting out and positioning diagram
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Drainage ditch is set around the foundation of A-7, and there is no water on the foundation ground
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The grounding wire is made of 40mm Х 4mm galvanized flat steel, which is connected with the main structure of the vertical pole with two bolt clamps
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The lightning protection contact points are no less than four (the lightning protection points are set at the four corners of the building), and meet the requirements of the special lightning protection scheme, so as to ensure the effectiveness of lightning protection grounding
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A-8 vertical and horizontal sweeping pole: the vertical sweeping pole is fixed on the column 20cm away from the bottom of the base with right angle fasteners, and the horizontal sweeping pole is fixed on the column close to the bottom of the vertical sweeping pole with right angle fasteners
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When there is a risk of tripping at the entrance and exit of the passage, the sweeping pole can not be installed
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The joints of two adjacent columns of A-9 vertical pole shall not appear in the same span at the same time, and the staggered distance in the height direction shall not be less than 500mm
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The horizontal distance between adjacent joints of A-10 longitudinal horizontal bar shall not be less than 500mm, and the distance between each joint and column shall not be more than 500mm
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The joints shall be staggered, not in synchronization and within the same span
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The lengthening of a-11 diagonal brace is overlapped by fasteners
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The length shall not be less than 1 m and not less than 3 fasteners A-12
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Two small cross bars shall be set under the joints of scaffold board, and the distance between the end of the board and the small cross bar shall be 100-150 mm
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The scaffold board overlapped by A-13 must be laid on the small cross bar, and the overlapping length shall not be less than 200 mm
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The scaffold board at the corner must be crossed and laid, the lap length of the joint a ≥ 100 mm, l ≥ 200 mm, and each scaffold board must be bound at four points
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A-14 scaffold shall be provided with continuous cross bracing on the whole length and height of the external facade
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The distance between the center points of each fastener at the main node of A-15: a ≤ 150 mm
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Rigid connection is adopted for A-16 wall connecting parts, which are set according to two steps and three spans, but the covering area of wall connecting rod shall be less than or equal to 27 square meters
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Φ 20 steel bar shall be embedded on the side of structural concrete
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The embedded length and welding width of steel bar shall meet the load requirements of special scheme
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The wall connecting rod shall be set close to the main node, and the distance from the main node shall be less than or equal to 300 mm
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Requirements for raw materials of A-17 steel wire rope unloading embedded parts: round steel with diameter ≥ Φ 20 is adopted, embedded nut assembled embedded parts are recommended, and the embedded length must meet the load requirements of special scheme
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Installation requirements of A-18 steel wire rope unloading embedded parts: the embedded position is outside the structural beam, and it is strictly forbidden to connect the unloading steel wire rope before the concrete is 28 days old
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Wrong method of unloading embedded parts with steel wire rope: the embedded parts are installed on the structural beam surface, leaving hidden danger of leakage for external wall construction
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A-19 requirements for raw materials of overhanging load embedded parts: round steel with diameter ≥ Φ 20 is used, rebar is strictly prohibited, and the embedded length must meet the load requirements of special scheme; wrong practice of overhanging load embedded parts: late welding and fixation are strictly prohibited
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Requirements for A-20 scaffold embedded wall connecting parts: the diameter ≥ Φ 20 round steel embedded parts shall be used and fully welded with the scaffold
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It is strictly forbidden to use rebar for embedded parts, and the embedded length and welding length must meet the load requirements of the special scheme; the connection method of using and embedding steel plate nut is recommended
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The wrong way of embedding wall connecting parts in scaffold: the embedded parts are installed on the structural beam surface, leaving hidden danger of leakage for the external wall construction
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A-21 cantilever unloading setting requirements: the cantilever steel beam shall be no less than 16 I-steel, and the height of I-steel cantilever frame (without wire rope unloading) shall not exceed 24m; if the height exceeds 24m, there shall be a special unloading scheme, which can be implemented only after being confirmed by the supervisor and Party A
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A-22 requirements for protective fence at elevator portal: height of guardrail ≥ 1.6m, vertical reinforcement spacing ≤ 100 mm, top standard floor and warning signs, 180mm high skirting board installed at the bottom, skirting board made of plywood ≥ 9 mm thick, low voltage lighting must be set inside the elevator shaft
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A-23 stair guardrail setting requirements: the detachable water pipe guardrail with a height of ≥ 1.2m shall be adopted; the stairs with a drop of more than 3m near the edge must be hung with a net and 180mm high skirting board shall be installed at the bottom, and the skirting board shall be made of plywood with a thickness of ≥ 9mm
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Sealing protection requirements of opening length and width ≥ 400mm х 400mm in A-24 floor: the opening is fixed with four point expansion screw 6@150 The steel mesh shall be sealed with plywood with thickness of more than or equal to 10 mm on the surface, covered with blank holder for 200 mm on all sides, and then sealed with mortar
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A-25 floor opening length and width < 400mm х 400mm sealing protection requirements: 10mm thick plywood fixed, brush eye-catching paint mark
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The setting requirements of A-26 edge guardrail: the removable water pipe guardrail with a height of 1.2m shall be used
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After the installation, the safety net shall be hung for protection
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180mm high skirting board shall be installed at the bottom, and the skirting board shall be made of plywood with a thickness of ≥ 9mm
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A-27 scaffold bottom net setting requirements: one layer of bottom net shall be set for every three floors, 180mm high skirting board shall be installed at the bottom, and the skirting board shall be made of plywood ≥ 9mm thick
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A-28 scaffold hard sealing setting requirements: the material is made of 10 mm thick plywood, a layer of hard sealing protective scaffold board is set every 6 floors, 180mm high skirting board is installed at the bottom, and the skirting board is made of ≥ 9mm thick plywood
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A-29 foundation pit guardrail setting requirements: removable water pipe guardrail with height of 1.2m is adopted, and then safety net is hung for protection
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180mm high skirting board is installed at the bottom
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The skirting board is made of plywood with thickness of ≥ 9mm, and concrete anti sill skirting board is recommended
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A-30 can not be closed with plywood guardrail setting requirements: use detachable water pipe guardrail, height ≥ 1.2m; the edge exceeds, 180mm high skirting board is installed at the bottom, and the skirting board is made of ≥ 9mm thick plywood
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A-31 safety passage setting requirements: the material is 10 mm thick plywood, with double plywood hard sealing protection, pedestrian passage layer height ≥ 2 ma-32, tower crane transportation coverage, protective shed setting requirements: the material is 10 mm thick plywood, with double plywood hard sealing protection
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Setting requirements of a-33 skirting board: plywood with thickness of ≥ 9mm and height of 180mm shall be used, and one layer of skirting board must be set for each layer; the skirting board shall be set between the upright pole and safety net
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A-34 requirements for raw materials of construction stairs: steel pipe, steel mesh step board or steel plate step board, 5mm thick plywood skirting board; requirements for construction stairs: width of step board is 300 mm, width of stairs is more than or equal to 1000 mm, width of rest platform is more than or equal to 1000 mm, height of skirting board is 180 mm, slope should be 1:3, height of railing is 1.2 m.
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