1. General
1.0.1 This code is prepared for implementation of national techno-economical policies during design and construction of fastened steel tube scaffolds so as to ensure them to be technologically advanced, economically reasonable, safe in use and acceptable in quality.
1.0.2 This code is applicable for design and construction of floor-type (bottom bracing) single- and double-row fastened steel tube scaffolds used in construction of industrial and civil architecture, and for design and construction of constructional template brackets of horizontal concrete structures.
Single-row scaffold is not applicable for:
1) The wall with a thickness of less than or equal to 180mm;
2) The building with a height of more than 24m;
3) The lightweight wall such as hollow brick wall and air entrained wall etc.
4) Brick wall with strength grade of laying mortar being less than or equal to M1.0.
1.0.3 Prior to construction of fastened steel tube scaffolds, design calculation shall be made pursuant to this code on the bearing capacity of scaffold’s structural components and standing poles, which, however, is not needed for the relevant members under the conditions as defined in Article 5.1.5 of this code.
1.0.4 Prior to construction of fastened steel tube scaffolds, constructional organization design shall be compiled in accordance with this code.
1.0.5 In addition to this code, design and construction of fastened steel tube scaffolds shall also be in compliance with national current provisions in related to compulsory standards.
2. Terminologies and Symbols
2.1 Terminologies
2.1.1 Scaffold
Temporary framework erected for loading, stacking and operation for building construction.
2.1.2 Single-row scaffold (single-row rack)
Only with one row of standing pole, and one end of its lateral horizontal pole resting on wall body.
2.1.3 Double-row scaffold (double-row rack)
Composed of two rows of standing poles and horizontal poles respectively at inner and outer sides.
2.1.4 Structural scaffold
Used for construction operation of laying framework works.
2.1.5 Decoration scaffold
Used for construction operation of decoration works
2.1.6 Scaffold provided only with rails and toe plate but not any other sheltering facilities.
2.1.7 Partially screened scaffold
With sheltering area of less than 30%.
2.1.8 Semi-screened scaffold
With sheltering area of 30-70%.
2.1.9 Wholly screened scaffold
Being screened in full length and full height along its outer side.
2.1.10 Template bracket
Used for supporting the template and erected with the same materials as scaffold.
2.1.11 Open scaffold
Erected without crossover around building.
2.1.12 Close scaffold
Erected with crossover along the circumference of building.
2.1.13 Fastener
Buckled adapting piece fastened by bolting.
2.1.14 Square fastener
Used for interconnection of square crossing members.
2.1.15 Turning fastener
Used for interconnection of horizontal or oblique crossing members.
2.1.16 Butt-joining fastener
Used for butt connection of members.
2.1.17 Antislip fastener
Fastener not used for connection but added pursuant to antislip requirement.
2.1.18 Base
Pedestal provided at the bottom of standing pole.
2.1.19 Fixed base
Base with its pedestal height being nonadjustable.
2.1.20 Adjustable base
Base with its pedestal height being adjustable.
2.1.21 Sole plate
Supporting plate placed under the base.
2.1.22 Standing pole
Vertical member in perpendicularity to horizontal surface in scaffold.
2.1.23 Outer standing pole
Standing pole being away from one side of wall body for double-row scaffold; or standing pole in single-row scaffold.
2.1.24 Inner standing pole
Standing pole being adjacent to one side of wall body for double-row scaffold.
2.1.25 Corner pole
Standing pole located at the corner of scaffold.
2.1.26 Dual-tube standing pole
Two standing poles erected in parallelism and adjoining each other.
2.1.27 Primary standing pole
Directly bearing top load in dual-tube standing pole.
2.1.28 Secondary standing pole
Sharing load with primary standing pole in dual-tube standing pole.
2.1.29 Horizontal pole
Horizontal member in scaffold.
2.1.30 Longitudinal horizontal pole
Horizontal pole erected longitudinally along scaffold.
2.1.31 Lateral horizontal pole
Horizontal pole erected laterally along scaffold.
2.1.32 Ground pole
Horizontal pole erected near to the ground for connecting the root of standing pole.
2.1.33 Longitudinal ground pole
Ground pole erected longitudinally along scaffold.
2.1.34 Lateral ground pole
Ground pole erected laterally along scaffold.
2.1.35 Wall connecting piece
Component for connection of scaffold to building.
2.1.36 Rigid wall connecting piece
Wall connecting piece composed of steel tube, fastener or embedded part.
2.1.37 Flexible wall connecting piece
Wall connecting piece with reinforced bar used as tie bar.
2.1.38 Spacing of wall connecting piece
Distance between two adjacent wall connecting pieces in scaffold.
2.1.39 Vertical distance of wall connecting piece
Vertical distance between two adjacent wall connecting pieces up and down.
2.1.40 Lateral distance of wall connecting piece
Horizontal distance between two adjacent wall connecting pieces left and right.
2.1.41 Lateral diagonal
Sway rod being in oblique crossing against inner and outer standing poles or horizontal pole in double-row scaffold.
2.1.42 X-Bracing
Intercross sway rod erected in pair at outer side of scaffold.
2.1.43 Buttress brace
Member being in oblique crossing against the outer side of scaffold.
2.1.44 Height of scaffold
Vertical distance from bottom surface of the base of standing pole to upper surface of rail on top of scaffold.
2.1.45 Length of scaffold
Horizontal distance between outer surfaces of standing pole longitudinally at two ends of scaffold.
2.1.46 Width of scaffold
Horizontal distance between outer surfaces of standing pole laterally at two sides of double-row scaffold, or the distance from outer surface of outer standing pole to the wall for single-row scaffold.
2.1.47 Step spacing of standing pole (step)
Axial distance between top horizontal pole and bottom horizontal pole.
2.1.48 Spacing of standing pole
Axial distance between two adjacent standing poles in scaffold.
2.1.49 Longitudinal distance of standing pole (span)
Longitudinal distance between two standing poles in scaffold.
2.1.50 Lateral distance of standing pole
Lateral distance between two standing poles for double-row scaffold; or the distance from the axis of outer standing pole to the wall for single-row scaffold.
2.1.51 Main node
Fastening point for close contacts of standing pole, longitudinal horizontal pole and lateral horizontal pole.
2.1.52 Operation layer
Laid with board for people to work on it.
