Technology & Innovation
Frame, attachment, anti-fall device, load control and lifting, as TianDe’s product materials describe them.
Frame
The frame system’s components are bolted together into a 14 m high structure.
The manufacturer states that the aluminium-alloy members do not need repainting between uses.
Main beams (guide rails), walkway boards, uprights and mesh panel channels are 6061-T6 aluminium-alloy extrusions, and the corrugated mesh panels are pressed from 3003 aluminium-alloy sheet. Steel is retained for parts that need high rigidity and have many welds, such as the lifting frames, support trusses and wall-mounted hanging seats. The hoist hangers are welded from square tube and steel plate, and the through-wall rods are M33 Q235 steel.
Attachment
Each wall support carries a load-relief strut at its upper end, a guiding anti-tilt device at its front and a ratchet-and-pawl anti-fall device at the middle of its lower end.
Two main-beam sections joined in series form the anti-overturning, anti-fall track, which connects to the wall supports fixed to the building and transfers the frame’s load to the building.
Anti-fall
According to TianDe’s brochure, each wall support carries a ratchet-and-pawl anti-fall device: the main beam’s anti-fall slots act as the ratchet and the anti-fall bar on the wall support acts as the pawl. If the guide rail descends faster than the pawl can reset, the pawl props against a slot and prevents the frame from falling.
Anti-fall and anti-tilt devices are provided independently at every wall support.
Shown without the support housing: the guide rail moves slowly downwards and the star wheel turns in its slots, beside the trigger and the forked top rod of the wall support. Towards the end the animation shows the rail dropping faster and then stopping, with the trigger between two arms of the star wheel.
The guide rail moves steadily upwards through the wall support. The housing is first shown semi-transparent and is then hidden to reveal the star wheel turning in the rail’s slots, with the trigger above it.
Rendered animation from TianDe’s product materials (20 s; the original sound is not included)
Manufacturer’s mechanism animation: explanatory, not a physical test. The 3D models are CAD-based product visualisation and show structure only.
Open the wall-support display model with the anti-fall device selected. The 3D model shows structure only.
Explore the anti-fall device in 3DLoad control
Described by TianDe as an active safety device, the synchronous load control system monitors and controls the load at every lifting point in real time. It gives early warning of overload and load loss and controls both: it raises an alarm at 15% overload or underload and stops automatically at 30%.
Lifting is computer-controlled, with audible and visual safety alarms.
Computer-controlled; thresholds apply to overload and underload.
Lifting
The lifting system uses 7.5 t electric hoists mounted in an inverted arrangement.
The wall-mounted hanging seats are the frame’s connection points with the building while it is raised or lowered; they anchor the hoist chains and transfer the load to the structure.
Company film
Edited sequences that explain the system. They are not installation or operating procedures.
The anti-fall animations are in the Anti-fall Safety Mechanism section.
Animated sequence from TianDe’s company film that introduces the three systems and labels their main components on screen in Chinese.
Rendered sequence from TianDe’s company film showing stages of assembling the frame against a building.
Rendered sequence from TianDe’s company film showing the wall supports and lifting equipment, and the frame rising past a wall support.
Sample test
One AJA-IV sample with four lifting points, tested in China in 2020 with two levels each loaded at 0.5 kN/m².
Scope. This was a historical test of one sample in China, commissioned by TianDe; its results apply only to the sample tested and are not an Australian certification or approval.
In a 2020 test of an AJA-IV sample with four lifting points, China’s National Center for Quality Supervision and Test of Building Engineering recorded anti-fall braking distances of 53–77 mm against the report’s criterion of 80 mm or less, with two levels each loaded at 0.5 kN/m².
The same report recorded a maximum level difference of 3 mm between adjacent lifting points over three ascents and three descents, against a criterion of 30 mm or less, under the same 0.5 kN/m² test load.
Under the same 0.5 kN/m² test load, the report also records that the load-limiting control system gave overload and load-loss alarms and automatic stops at all four lifting points, meeting the report’s criteria.
3D models
CAD-based product visualisation: the models show the structure at rest and animate no mechanism, and exploded views are for presentation only. The anti-fall device is explained by the manufacturer’s mechanism animations, and lifting by the company-film sequences.
Achievements
TianDe designs and develops its own attached climbing scaffolds.
These records relate to China. None of them is an Australian approval or certification.
TianDe developed AJA-IV from its earlier all-steel attached climbing scaffold. According to TianDe, AJA-IV uses aluminium alloy for most of its members, which makes it lighter than the earlier Q235 steel scaffold; steel is kept for parts that need high rigidity.
AJA-IV is marketed under the 奥吉铵 product brand; TianDe’s brochures present it as the 奥吉铵 AJA-IV.
A utility model for an attached intelligent lifting scaffold, with TianDe as patentee: application filed in November 2019, grant announced in December 2020.
Protection under a Chinese utility model applies only in China and lasts at most ten years from filing. The grant certificate records the position at grant, not the patent’s current legal status. The certificate does not name a product model.
A construction-industry science and technology achievement assessment certificate for the AJA-IV aluminium–steel integrated attached lifting scaffold from the Science and Technology and Industrialization Development Center of China’s Ministry of Housing and Urban-Rural Development, with an assessment date of 24 December 2020 and TianDe as the completing and applying organisation.
A Chinese technology assessment, not a certification or approval. It has no standing in Australia.
Next step
Email TianDe about AJA-IV equipment, product information or the cooperation you are considering.
