External wall scaffolding erection norms what scaffolding erection steps

Exterior wall in the construction in order to be smooth, it is necessary to set up scaffolding, so that the workers in the construction of the time, but also will be very convenient. But in the scaffolding time, there are norms, because this aspect is related to our safety. So we have to pay attention to various aspects. Below you and we to understand, exterior wall scaffolding norms what?

One, what are the norms for scaffolding on external walls

1, erection time, ordinary cantilevered frame cantilevered scaffolding erection process as follows: very important, horizontal cantilevered → longitudinal sweeping pole → vertical pole → horizontal sweeping pole → small horizontal bar → large horizontal bar (fence) → scissor braces → connecting wall → paving scaffolding → tie protection rails → tie safety nets. Positioning. According to the construction requirements in the four corners of the building with a ruler to measure out the distance from the wall of the inner and outer poles, and make a good mark; straighten with a steel tape measure, divided into poles position, and with a small piece of bamboo to point out the poles marking; pads, pads must be laid flat, not overhanging.

2, from the operation, in the process of erecting the first layer of scaffolding, along the perimeter of each frame frame within a diagonal support, corner in addition to the two-way increase, to be the part of the scaffolding and the main structure of the connecting wall pieces reliably pull the connection can be dismantled only after. When the scaffolding operation level is two steps higher than the connecting wall, it is appropriate to set up the outer row first, and then set up the inner row. The next construction requirements.

Two, scaffolding erection steps

1, first of all, the main pole foundation of this project scaffolding foundation parts should be tamped after the backfill, very important aspect, the use of strength grade not less than C15 concrete hardening, concrete hardening thickness of not less than 10cm. foundation bearing capacity to meet the erection of the scaffolding requirements (specific calculations refer to the scaffolding). (Refer to the scaffolding calculation book for specific calculation data). Steel pipe floor scaffolding, choose the outer diameter of 48mm, wall thickness of 3.20mm, steel strength grade Q235-A, the surface of the steel pipe should be straight and smooth, there should be no cracks, the new steel pipe should have a factory certificate.

2, and then there is, scaffolding construction before the admission of steel pipe sampling must be understood. Sent to the relevant national qualification test unit, steel pipe bending, tensile and other mechanical tests, test results to meet the design requirements, before being used in construction. The erection of steel pipe scaffolding using malleable casting fasteners, should be consistent with the Ministry of Construction, "steel pipe scaffolding fasteners standard" JGJ22-85 requirements, provided by the manufacturer with fastener production license, sandhole and other forging defects, fasteners specifications should be matched with the steel pipe, affixed and the surface should be dry and whole, the minimum distance of the opening when clamping the steel pipe is not less than 5mm.

3, and finally is that, the steel pipe bolts Tightening torque up to 70N.m shall not be destroyed. To understand clearly, such as the use of old fasteners, fasteners must be sampled and sent to the relevant national qualifications of the test unit, fasteners anti-slip force and other tests, the test results to meet the design requirements before they can be used in construction. Before erection of the shelf should be maintained, rust removal and uniform coloring, the color of the environment to strive for beautiful. Scaffolding poles, guard rails, skirting poles uniformly painted yellow, sweeping poles are painted red and white color.

Scaffolding in the erection of the time, must be in accordance with the norms to carry out, so that the safety factor is relatively high.