(1) Ground-supported scaffolding
(2) Frame scaffolding
(3) Cuplock scaffolding
(4) Ringlock scaffolding
(5) Full hall scaffolding
(6) Cantilevered scaffolding
(7) Attached lifting scaffolding (commonly used for high-rise buildings, especially super high-rise buildings)
(8) Aerial work baskets（Suspend platform）
Secondly, Ground-Supported Scaffolding:
1.A specialized construction plan and safety technical measures must be prepared before erection, and the scaffolding must pass inspection and acceptance before being put into use.
2.Ground-supported scaffolding can be categorized by material into bamboo scaffolding (prohibited), timber scaffolding, and coupler steel tube scaffolding; by function into masonry scaffolding and decorative scaffolding; by structural form into single-row and double-row scaffolding, internal and external scaffolding, full-height scaffolding, ramps, and walkways; and by shape into linear, open, and enclosed types.
(1) Single-row scaffolding is not suitable for the following situations:
It must not be used for buildings with a height exceeding 24m.
The crossbars of single-row scaffolding must not be installed in the following locations:
① Areas where scaffolding holes are not permitted by design;
② Within the triangular area formed by a 60° angle at both ends of a lintel and within half the height of the lintel’s clear span;
③ Walls between windows with a width of less than 1m;
④ Within 500mm on either side of a beam or beam pad;
⑤ Within 200mm on either side of door and window openings in brick masonry or within 450mm of corners, or within 300mm on either side of door and window openings in other types of walls or within 600mm of corners;
⑥ Walls with a thickness of 180mm or less;
⑦ Lightweight walls such as independent or attached brick columns, hollow brick walls, or aerated blocks;
⑧ Brick walls with mortar strength grade M2.5 or lower.
(2) Classification of double-row ground-supported scaffolding:
Standard type (scaffolding height greater than 24m but not exceeding 40m);
Super-high type (scaffolding height greater than 40m).
Thirdly, Material Requirements
(1) Steel tubes: Generally, welded steel tubes of 48.3mm × 3.6mm or seamless steel tubes of ф51mm × 3mm must be used, with material conforming to Q235A-grade steel standards. The weight of a single steel tube must not exceed 25.8kg, and steel tubes of different diameters must not be mixed. Steel tubes must be coated with anti-rust paint, and those with a corrosion depth exceeding 0.5mm must be scrapped and are strictly prohibited from use.
(2) Couplers:
1.Must be made of cast iron, with material conforming to the KTH330-80 standard for malleable iron castings.
2.Must come with the manufacturer’s production license, product qualification certificate, and quality certification.
3.Couplers must not have defects such as cracks, bubbles, deformations, or stripped threads, and must not have cast iron defects such as rust or sand holes that affect functionality. Defects affecting appearance, such as sand adhesion, residual gates, burrs, or scale, must be cleaned.
4.Couplers must fit tightly with steel tubes and form a secure connection when tightened. The coupler must not break when the bolt tightening torque reaches 65 N·m.
5.The surface of couplers must be treated for rust prevention.
(3) Scaffold boards:
1.Bamboo scaffold boards must have a thickness of no less than 5cm, a length of 3.2m, and a width of 30cm. The bamboo strips must be connected into a whole using tension bolts no larger than 10mm at both ends and at intervals of 500mm in the middle, and the bolts must be tightened.
2.Timber scaffold boards must be made of consistent-quality pine or red pine boards with a thickness of no less than 5cm, a width of 20–30cm, and a length of 4–5m. Both ends of the board must be wrapped with 2–3 loops of 4mm galvanized steel wire or nailed firmly with iron plates. Boards with significant rust, warping, cracking, damage, or large knots are strictly prohibited.
3.Steel scaffold boards must be made of Grade I steel with a thickness of 2–3mm, a length of 1.3–3.6m, a width of 23–25cm, and a height of 3–5cm. Both ends must be equipped with connection devices, and the surface must be drilled with anti-slip holes. Cracked or warped steel boards are strictly prohibited.
Fourthly, Requirements for Erecting Scaffold Uprights
(1) The foundation must meet the load requirements of the entire scaffolding structure and be 50mm–100mm above the natural ground level, with drainage measures implemented around it.
(2) A base plate for the uprights must be installed above the foundation, and the base plate must be at least 50mm higher than the foundation. When using timber base plates, metal bases must be added.
(3) The bottom step height of the scaffolding must not exceed 2 meters, and the uprights must be reliably connected to the building structure via wall ties.
(4) Except for the topmost step, which may use lap joints, all other joints of the uprights must be connected with butt couplers. Specific requirements are as follows: Butt couplers on uprights must be arranged staggered. The joints of two adjacent uprights must not be set at the same level. Two staggered joints at the same level must be separated vertically by no less than 500mm, and the distance from the center of each joint to the main node must not exceed one-third of the step height.
(5) The top of the uprights must extend no less than 1m above the top of the parapet wall and 1.5m above the eaves.
Post time: 2025-11-27 11:28:52