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What are the steps and spans of scaffolding fasteners?
Release time：
2022-09-23 09:51
source：
I believe everyone is familiar with scaffolding fasteners, but for workers who have just come into contact with such construction enterprises, most people do not know the step distance and span of scaffolding fasteners. The editor has summarized the relevant content here for your reference and understanding. So what are the steps and spans of scaffolding fasteners?
1. In short, the step distance of scaffolding fasteners refers to the distance between the axes of the upper and lower horizontal bars, usually 1.8m. The so-called span refers to the distance between adjacent axes, usually 1.5m; The same span and synchronization indicate that the height between each layer is equal, and the distance between each pole is the same. In addition, horizontal distance refers to the distance between the inner and outer poles of a double row scaffold. It can also be said that the row distance, which refers to the inner row and outer row, can also be referred to as double row.
2. The horizontal distance between upright poles refers to the distance between the inner and outer upright poles of the double row scaffold fasteners. It can also be called row spacing, which refers to inner and outer rows, or it can be more than two rows, namely single row and double row scaffolding;
3. Cross bar spacing refers to the vertical distance between the large cross bars of a scaffold. Previously, people always talked about one step framework and two step framework. Because this is the working surface operated by workers, it is vividly referred to as a "step"; The distance between the upper and lower crossbars is also known as "step distance".
In addition, the step distance of the bottom layer of the scaffold fastener should not exceed 2 meters, and the upright pole must be reliably connected to the building with wall connectors; At the same time, except for the top steps of the top layer, the joints of other layers must be connected through butt joints.
4. The longitudinal distance between upright poles refers to the distance between the same row of upright poles. Due to the longer length direction of single and double row scaffolding, i.e. longitudinal, it is also known as longitudinal distance;
5. If the docking method is used, the docking fasteners should be staggered. When using overlapping method, the overlapping length shall not be less than 1m and shall be fixed with at least 2 rotating fasteners. The distance from the edge of the end fastener cover plate to the rod end shall not be less than 100mm.
Advantages:
1) Large carrying capacity. When the geometric dimensions and structure of the scaffold meet the relevant requirements of the specifications, the bearing capacity of a single column of the scaffold can generally reach 15kn-35KN (1.5tf-3.5tf, design value).
2) Easy disassembly and flexible installation. Due to the easy adjustment of steel pipe length and simple connection of fasteners, it can adapt to the scaffolding of buildings and structures in various planes and elevations.
3) Relative economy. Simple processing, low one-time investment cost; If we carefully design the geometric dimensions of the scaffolding and pay attention to improving the turnover rate of steel pipes, material consumption can also achieve better economic benefits. A steel pipe frame with fasteners is equivalent to approximately 15kg of building steel per square meter.
Disadvantages:
1) Fasteners (especially their screws) are prone to loss;
2) The components at the nodes are eccentrically connected, and the load and internal force are transmitted through anti slip force to reduce their bearing capacity;
3) The connection quality of fastener nodes is significantly influenced by the quality of fasteners and worker operations.
Adaptability:
1) Construction of various forms of scaffolding, formwork, and other supporting frameworks;
2) Assemble the mast;
3) Setting up ramps, sheds, stands, and other temporary structures;
4) As an aid to other scaffolding, strengthen the pole.
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