Is there any secondary construction division exams over the years? (Municipal) can pass a thank you
First, according to the "construction site temporary safety technical specifications" provisions, construction projects (including scaffolding) and the overhead line between the edge of the minimum safe operating distance: When the external line voltage is 10KV, the minimum safe distance 6.0m. Second, according to the "Regulations on the Implementation of Regulations on the Protection of Electric Power Facilities" and the requirements of the National Standard GB / -1999 "Urban Electricity Planning" of the People's Republic of China, the safe distance of the urban overhead power lines close to or across the buildings is: Case) Line voltage (kV) <11 ~ ~ safety distance (m) 1.01.53.04.05.06.08.51 kilovolts below 1.0 m 1-10 kV 1.5 m 35 kV 3.0 m 66-10 kV 4.0 m 154 -220 kV 5.0 m 330 kV 6.0 m 500 kV 8.5 m
Fastener steel scaffolding 1) bearing capacity. When the scaffolding geometry and construction in line with the relevant requirements of the specification, under normal circumstances, scaffolding single tube column bearing capacity of up to 15kN ~ 35kN (1.5tf ~ 3.5tf, design). 2) easy assembly and disassembly, erection flexible. As the length of the pipe is easy to adjust, fastener connection is simple, and thus can be adapted to a variety of flat, facade buildings and structures with scaffolding. 3) more economical. Processing is simple, a low investment costs; if carefully designed scaffold geometry, pay attention to improve the use of steel pipe turnover, the amount of material can also achieve better economic results. Fastener steel pipe frame equivalent to about 15 kg per square meter of building steel.
This is not to say which specification is explained! Should be considered! See the load check and then choose whether to double pole!
Yes, air conditioning heating effect is good, the general cooling are good. Before installation of air conditioning, should be based on the size of the room to determine the size of air conditioning, the general household can be prepared by the amount of cold per square calorie 200 to calculate the size of air conditioning, but also consider the room sealed insulation performance, floor, orientation, height and other factors The In addition, should also be based on the nature of the room to determine the structure or type of air conditioning, such as the bedroom is most suitable for installation of inverter air conditioner, a large area of ??the living room suitable for installation of cabinet air conditioning. Installation of air conditioning should be noted: air conditioning should be installed in a location conducive to ventilation, especially the outdoor unit, should be installed in a well ventilated heat, clean and dust-free, oil, not sunshine direct exposure to the location should be lower than the indoor unit, It is best installed on the outer wall of the concrete beam from the floor, so that the installation of the most solid, the smallest noise, but also conducive to future maintenance. If you have to install a place higher than the indoor unit, the height difference is very large, the installation staff should be allowed to bend the connection pipe back to the oil bend to ensure that the compressor from the string of lubricants can be successfully returned to the compressor. In fact, the cooling principle of air conditioning is very simple, like the refrigerator, heating is through the switch on the four-way valve and one-way valve to make outdoor cooling, and indoor heating fills.
