The shortcomings of mobile scaffolding are: (1) the fastener (especially its screw) is easily lost; (2) the rod at the joint is eccentrically connected, transferring load and internal force by anti-sliding force, thus reducing its bearing capacity; (3) the connecting quality of the fastener joint is obviously affected by the quality of fastener itself and the manipulation of workers. Advantages: (1) Multifunctional: According to the detailed construction requirements, can form different groups of scaffolds size, shape and carrying capacity of single and double row scaffolds, support frame, support column, material lifting frame, climbing scaffolds, suspension and other functions of construction equipment. It can also be used for construction measures such as construction shed, material shed, lighthouse and so on.
Two. Bowl button type steel pipe scaffold
Adaptability: (1) Constructing stereotyped scaffolding; (2) acting as support for sorghum and slab frame (bearing vertical load); (3) Constructing mobile worktable;
Disadvantages: (1) There is no flexibility in the size of the frame, any change in the size of the frame should be replaced by another type of portal frame and its accessories; (2) cross support is easy to break at the middle hinge point; (3) the stereotyped scaffold is more expensive; (4) the price is more expensive;
Advantages: (1) scaling of portal steel tube scaffolds. (2) the structure is reasonable and the force function is good, making full use of steel strength and carrying capacity. (3) construction is easy to install and disassemble, high efficiency, labor saving, time saving, safety and reliability, and economic cooperation.
Three. Door type steel pipe scaffold
Adaptability: (1) Construct various forms of scaffolding, formwork and other support frames; (2) Assemble derrick; (3) Build ramps, shed, stand and other temporary structures; (4) Assist with other scaffolding to strengthen poles.
1 门式脚手架上的剪刀撑作用是什么 ?
1 what is scissors support on scaffolding?
Answer: prevent scaffold longitudinal deformation, enhance the overall stiffness of scaffolding.
2 脚手架的外侧有外电线路时有何安全规定 ?
2 what safety regulations do exist when there are external lines on the outside of scaffolding?
答：严禁在有外电线路的 — 侧搭设上下脚手架的斜道。
Answer: it is strictly prohibited to erect the upper and lower scaffolding ramps on the side with external lines.
3 手架是否能与卸料平台连结 ?
3 can the scaffold be linked to the unloading platform?
Answer: No, the unloading platform should be set up independently.
4 哪些钢管不准用于脚手架搭设 ?
4 which steel pipes are not allowed to be used for scaffold erection?
Answer: severely corroded, squashed, bent, cracked steel pipes.
5 哪种扣件不得使用 ?
5 which fastener should not be used?
Answer: no crack, deformation, shrinkage or slipping can be used.
6 卸料平台上应悬挂什么标牌 ?
6 what sign should be suspended on the unloading platform?
Answer: a sign indicating the load.
7 门型脚手架的搭设高度一般不宜超过多少米 ?
How much is the height of 7 scaffolding erected in general?
答：不宜超过 45 米 。
Answer: not more than 45 meters.
8 吊蓝架的承重钢丝绳与安全保险钢丝绳接长使用时，绳卡应不少于三个，这句话是否正确 ?
8. When the load-bearing steel wire rope of the blue hanger is connected with the safety steel wire rope for a long time, the rope clamp should be no less than three. Is this correct?
Answer: incorrect, because these two kinds of wire rope can not be used for long.
9 整体提升架在升降时有何安全要求 ?
9 what is the safety requirement of the lifting frame when lifting?
Answer: stand and stand is strictly prohibited when lifting.
10 整体提升机的主要安全装置的哪些 ?
10 what are the main safety devices of the whole hoist?
Answer: anti falling device and anti overturn device.
11 吊篮脚手架须配备哪些安全防护装置 ?
What safety guards shall be provided for the 11 basket scaffold?
Answer: brake, travel limit, An Quansuo, anti tilt device, overload protection device.
12 吊篮脚手架配重有哪些要求 ?
12 what are the requirements for the weight of the scaffolding?
答： (1) 吊篮的悬挂机构或屋面小车上必须配置适当的配重； (2) 配重应准确、牢固地安装在配重点上，并应按图样规定配置足够质量的配重，在吊篮使用前须经过安全检查员核实才能使用； (3) 抗倾覆系数等于配重矩比前倾力矩，其比值应不小于 2 。
Answer: (1) The suspension mechanism of the hanging basket or the roof trolley must be equipped with appropriate weights; (2) The weights should be accurately and firmly installed on the matching points, and should be equipped with enough quality weights according to the drawings, which must be verified by the safety inspectors before the hanging basket is used; (3) The anti-overturning coefficient is equal to the ratio of the counterweight moment to the forward overturning force. The ratio should not be less than 2.
13 脚手架立杆顶端应高出屋面多少 ?
13 how much should the top of the scaffolding stand above the roof?
答：立杆顶端应高出女儿墙上皮 lm ，高出檐口上皮 1 ． 5m 。
Answer: the top of the vertical pole should be higher than the LM of the parapet wall and higher than the 1.5m of the cornice epithelium.
14 钢、竹混搭脚手架是否可用 ? 为什么 ?
14 are steel and bamboo mashup scaffolds available? Why?
答：不可用。脚手架的基本要求是整体受力后，不摇晃、不变形，保持稳定。杆件的节点是传力的关键，而混搭的脚手架，无可靠的绑扎材料，造成节点松驰，架 体会 产生变形，不能满足脚手架的受力要求。
Answer: not available. The basic requirement of scaffolds is that they do not shake, do not deform, and remain stable after being stressed. The joints of the members are the key to transfer the force, and the mixed scaffolding, without reliable binding materials, causes the joints to relax and the frame will be deformed, which can not meet the force requirements of the scaffolding.
15 脚手架及其地基基础在哪些阶段应进行检查与验收 ?
15 what stages should the scaffold and its foundation be inspected and checked?
答： (1) 基础完工后及脚手架搭设前； (2) 作业层上施加荷载前； (3) 每搭设完 10 一 13m 高度后； (4) 遇有六级大风与大雨后，寒冷地区开冻后； (5) 达到设计高度后； (6) 停用超过一个月。
Answer: (1) After the foundation is completed and before the scaffolding is erected; (2) before the load is applied on the working layer; (3) after every 10-13 m height is erected; (4) after the six-level gale and heavy rain, the cold area is frozen; (5) after reaching the design height; (6) after the suspension of service for more than one month.
16 从事脚手架搭设人员应佩戴哪些防护用品 ?
16 what protective equipment should be worn by scaffolding erection personnel?
Answer: wear safety helmet, fasten seat belt and wear antiskid shoes.
17 脚手架使用期间，严禁拆除哪些杆件 ?
17 during the use of scaffolding, which bar must not be removed?
答： (1) 主节点处的纵向横向水平杆，纵、横向扫地杆； (2) 连墙件。
Answer: (1) vertical horizontal horizontal bar at main node, vertical and horizontal sweeping rod; (2) continuous wall parts.
18 从事架子搭设作业人员须具备哪些条件 ?
18 What are the conditions for operators to erect shelves?
Answer: Scaffold erectors must be qualified professional scaffolders who have passed the current national standard "Safety and Technical Assessment Management Rules for Special Operators". They should have regular physical examinations before qualified persons can hold certificates.
19 《建筑施工门式钢管脚手架安全技术规范》中对门式钢管架的剪刀撑设置有哪些要求 ?
19 What are the requirements for setting scissors braces for portal steel tubular scaffolding in the Technical Code for Safety of Portal Steel Tube Scaffolding in Construction?
答： (1) 脚手架高度超过 20m 时，应在脚手架外侧连续设置； (2) 剪刀撑斜杆与地面的倾角宜为 45 度一 60 度，剪刀撑宽度宜为 4— 8m ； (3) 剪刀撑应采用扣件与门架立杆扣紧； (4) 剪刀撑斜杆若采用搭接接长，搭接长度不宜小于 600mm ，搭接处应采用两个扣件扣紧。
Answer: (1) When the height of scaffolding exceeds 20 meters, it should be set continuously on the outside of scaffolding; (2) the inclination angle between the scissors supporting slant rod and the ground should be 45 degrees to 60 degrees, and the width of the scissors supporting should be 4-8 meters; (3) the scissors supporting should be fastened by fasteners and the gantry erecting rod; (4) if the scissors supporting slant rod adopts lapping connection length, the lapping length should not be less than 6 degrees. 00mm, two fasteners should be fastened at the lap joint.
20 门式脚手架搭设中对脚手架整体垂直度与水平度偏差有何要求 ?
What are the requirements for the overall verticality and level deviation of scaffolding in the 20 door scaffolding erection?
答：垂直度允许偏差为脚手架高度的 1 ／ 600 及 ± 50mm ；水平度允许偏差为脚手架长度的 1 ／ 600 及 ± 50mm 。
Answer: The allowable deviation of verticality is 1/600 and +50mm of scaffold height, and the allowable deviation of horizontality is 1/600 and +50mm of scaffold length.
21 对砌筑架与装饰架的荷载是如何要求 ?
21 what is the load on masonry and decorative frames?
答：砌筑架负荷应不超过 270 公斤 ／平方米，装饰脚手架应不超过 200 公斤 ／平方米。
Answer: Masonry frame load should not exceed 270 kg/m2, decorative scaffolding should not exceed 200 kg/m2.
22 人字梯应采取什么防滑措施 ?
22 what anti slip measures should be adopted for the ladder?
Answer: There should be strong hinges and zippers that restrict the development. Anti-skid measures should be taken when using sliding ground.
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