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TCCIAT0003-2019, Safety Technical Regulations for Construction Socket Wheel Buckle Template Support, is a group standard of the China Construction Industry Association. This standard was commissioned by the China Construction Industry Association to be issued by China Construction Industry Press and implemented on April 1, 2019..
The support height of the plug-in wheel buckle template support should not exceed 8m..
The steel plate for adjustable support and adjustable base should be made of Q235B steel plate. The thickness of the adjustable support steel plate should not be less than 5mm, and the thickness of the adjustable base steel plate should not be less than 6mm; Adjustable support plates should be equipped with opening baffles, and the height of the baffles should not be less than 40mm; The length and width of the adjustable base steel plate should not be less than 150mm..
Adjustable support and adjustable base steel plates should be welded to the screw ring, and a stiffening plate should be installed under the support plate; The design value of compressive bearing capacity should not be less than 40kN..
When there is a stable existing structure, the template support should be reliably connected to the stable existing structure and should comply with the following regulations:.
When the foundation of the template support pole is not at the same height, the sweeping pole at the high position must be pulled through with the horizontal pole at the low position; When the upright pole needs to be encrypted, the distance between the non encrypted upright pole and the horizontal pole should be a multiple of each other with the encrypted area; The horizontal pole in the encrypted area should extend no less than 2 spans towards the non encrypted area; When the span of the template support is one span, reliable stabilization measures should be taken on the lateral side of the template support..
3. The height to width ratio of template supports without reliable lateral connections should not exceed 3. When the aspect ratio is greater than 3 and there are no tie conditions around it, measures such as expanding the size of the lower part of the frame or other structural measures should be taken..
Note: Article 6.1.4 of JGJ 231-2010 specifies that the aspect ratio should not exceed 3 in the “Safety Technical Specification for Construction Socket type Disc Buckle Steel Pipe Supports”; Article 5.1.8 of JGJ 300-2013 in the “Technical Specification for Temporary Support Structures in Construction” states that when the aspect ratio is greater than 3 and there are no reliable connections around, wind ropes or other anti overturning measures have been installed..
Article 6.2.5 of the “Safety Technical Specification for Bowl Buckle Steel Pipe Scaffolding in Construction” JGJ 166-2008 states that the aspect ratio should be less than or equal to 2. When the aspect ratio is greater than 2, measures such as expanding the lower dimensions of the scaffold or other structural measures can be taken. Article 6.9.7 of JGJ 130-2011 Safety Technical Specification for Coupler type Steel Pipe Scaffolding in Construction: When the height to width ratio of the support frame is greater than 2 (2.5), rigid connections should be made. The height to width ratio of the support frame should not exceed 3.
6. The cantilever length (h2) of the adjustable support extending out of the top horizontal rod must not exceed 650mm; The extension length of the adjustable support screw should not exceed 300mm, and the length inserted into the upright pole should not be less than 200mm; The main beam on the adjustable support should be centered, with a gap of no more than 2mm on each side..
7. The support height (H) of the template bracket shall not exceed 3m, and the thickness of the floor slab (D) shall not exceed 200mm, and the beam cross-section surface shall not exceed 200mm.
