Horizontal bar.doc

Horizontal bar Horizontal bar Even the wall bar Even the wall pole (floor) Even the wall pole (column) Even the wall pole (shear wall) Even the wall pole (setting embedded parts) Throw brace Finalize the design the gate With 80 mm square mosaics, choi steel side package, at the top of the double scaffold board. bracing The transverse brace Discharging platform (floor) Construction in the mouth of the cave, border protection measures Four safety protection Reserve the hole safety protection Floor, roof and platform on the short side size is less than 250 mm but greater than 25 mm orifice, must cover set with solid plate, plate should be able to prevent displacement of the move. Side in the 250-500 - mm hole, must use solid cover plate to cover the hole. Cover plate must be balanced around aside and should be fixed its position. Side of 500-1500 - mm hole, the use of steel fasteners in tightening up the hole by hole edge positioned well type platform, platform laid wooden fang at regular intervals, spread nail on the wooden fang board form for protection. Cover black warning yellow paint and red paint marks no mobile. Also can be used throughout in the concrete slab of steel nets, steel grid spacing shall not be greater than 200 mm. In more than 1500 mm in length of the cave The main structure construction, the use of steel fasteners on the mouth of the well glyph platform shall be built, platform laid hard material (wood fang template) for protection. Set-up protective barrier around the hole (railings, the form of double way railing next 500 mm from the ground, on the rail 1100 mm from the ground, made 1200 mm height), hang on the outside of rail safety warning signs be careful to fall. Installation and decoration construction, the set-up protective barrier around the hole (railings, the form of three railings next 100 mm from the ground, the tathagata rail 500 mm from the ground, on the rail 1100 mm from the ground, made 1200 mm height), the hole under the net AnQuanPing, hang on the outside of rail safety warning signs be careful to fall. Protective barrier from the hole edge should not be less than 200 mm. The elevator wellhead safety protection Elevator shaft door hole installation tool type door not less than 1500 mm high. Door installed at the bottom of the 200 mm tall woodiness skirting board, door the lateral compartment falls beware security warning signs. Inside the elevator shaft level protection adopts the well hole with steel pipe protection platform shall be built, spread the springboard or pocket hang above AnQuanPing network protection. The location of the level of protection, should be every two layers and set up to 10 m a level of protection. Set-up method: steel platform for sanding in the elevator shaft concrete, the four corners of the well embedded 60 PVC pipes, template, dismantled and insert steel pipe embedded inside the PVC tube, and then build protection platform. Pipe wellhead safety protection Pipe mouth of the well must be set fixed door or set two protective railings, stationary door application 14 16 steel gate, and firmly fixed. Gate height not less than 1500 mm, the vertical bar spacing is not more than 150 mm. Pipe well within the first layer and the layer above every two layers (no more than 10 m) for a level of safety net, net should be closed tightly. Network edge and borehole wall surrounding clearance shall not be greater than 20 mm, the population from beneath the object (or bar) shall not be less than 3 m. Construction layer should be set-up operation platform, and spread the springboard. Construction of well pipe shall not be used as the vertical transport channels and garbage. Gangway safety protection The structure of the main entrances must be set safe passage protective shed, safe passage protective casing with steel tube fastener build-up. Protective canopy width should be slightly wider than opening, length is determined according to the height of the building, under 15 m height of buildings, channel shed a length of 3 m or more; 15-30 m high building, channel shed length 4 m or more; Over 30 m high building, channel shed a length of 5 m or more, channel shed length from outer scaffold outside starting poling. Protective roof can use 50 mm boards or other materials of 50 mm thick planks strength, when in low strength materials such as bamboo ba, should use double protective casing, layer spacing is 600 mm. Safe passage with dense mesh net closed on both sides. Protective casing should be set up in the following part safe passage: material hoist inlet, external use elevator ground set-up the location of the inlet and the other needs. Secure channel tent facade can be set up safety sign or warning signs. Secure channel tent on both sides of the slogan safety signs content choice for reference. Limb safety protection In the foundation pit safety protection In the foundation pit edge using steel pipe protection, protective barrier height not less than 1.2 m, foundation pit fence from the distance of the pit is not less than 0.5 m, protective railings stud spacing is not greater than 2 m. In the foundation pit edge steel bar-mesh do protection, using conventional diamond mesh plate mesh, galvanized and plastic coated is applied to two kinds. Generally the most common application material for low carbon steel plate, steel net fixed steel net with 15 * 30 * 3 Angle. In the floor and safety protection When limb sill height less than 0.8 m, the lateral elevation difference is greater than 2 m, in accordance with the requirements for erection of guardrails. Floor border protection adopts steel fasteners in the build-up. Protection in the form of three bars, sweep the floor bar height 200 mm from the ground, consists of the skirting board; Tathagata rail height 700 mm from the ground, on the rail height 1200 mm from the ground, stud height 1300 mm, 2000 mm stud spacing. Steel pipe surface besmear brushs warning color red and white paint, the rail medial compartment falls beware security warning signs. The stairs limb safe protection The stairs and rest in the platform edge build protective railings. Protective railings with double barrier form, next rail from stair surface height is 450 mm, railing on road, away from the stairs surface height is 950 mm. Steel tube surface besmear brushs black warning yellow paint. The site temporary electricity safety measures Temporary electricity utilization management Electricity technical clarificaiton After the first approach to comprehensive macro disclosure of electrician, purpose is to carry out the electricity the intention of the organizational design, overall layout of temporary electricity at the scene. For each partial procedures for targeted specific disclosure. Such as: the site temporary power line installation, the installation of equipment, lighting, indoor wiring request specific and targeted. The disclosure of electricity on construction site personnel, its contents should include: the use and operation of the electrical equipment should be paid attention to and the need to conform to the rules. Electrician and electricity Electrician must after passing the examination according to the current standards of the state, hold relevant certificates; Other electricity personnel must pass the relevant safety education, training and technical clarificaiton, the inspection qualified rear can mount guard. Installation, inspection, maintenance or removal of temporary electricity devices and circuit, must be completed by an electrician, and they should care. To the difficulty of the electrical level should be with engineering and technical complexity. All kinds of electrical personnel should grasp the safe basic knowledge and the performance of the equipment used, and shall meet the following requirements: Using electrical equipment must be worn by the regulation and equipped with the relevant labor protection articles, and check the electrical devices and protection facilities, it is forbidden to equipment belt defect; Custody and maintenance of the equipment used, found that the problem solves promptly report; Temporarily disable device isolating switch, switch box must points off power and close the door lock; Mobile electrical equipment, it must be after electrician to cut off the power supply and make proper treatment. Grounding and lightning protection General provisions In the construction of the power supply of TN site dedicated transformer S meet zero protection system, the electrical equipment of the metal enclosure must be connected to the protective zero line. Protect the zero line should be work by grounding line, transformer room power distribution box (total) side zero or total leakage protector power side leads to zero. When the construction site and electric circuit when sharing the same power supply system, electrical equipment grounding, zero protection should be consistent with the original system. Shall not be part of the equipment to do protection to zero, the other part of the protective earthing devices do. Do TN system protection to zero, zero line (N) must be through the total leakage protector, protection of zero line (PE) must be repeated by power supply into line with zero meet is located in the total leakage protector or power supply side of the zero line, lead to form local TNS zero protection system. In TN meet zero protection system, through the work of total leakage protector between zero line and protection of the zero line shall not do electrical connections. In TN meet zero protection system, PE zero line should be separate installation. Repeat grounding wire must be connected to PE line, strictly connected to N line. Use one side more than 50 v power supply voltage of zero protection system, secondary side of 50 v and under voltage security isolation transformer, secondary side shall not grounding, and the second line should be protected with insulating tube or use rubber sheathed flexible wire. When using common isolation transformer, second primary side end up, and the transformer normal uncharged exposed conductive part should be connected to a circuit protective zero line. Transformer is above should be taken to prevent direct contact of the charged body protection. Construction site temporary electricity power system, it is strictly prohibited the use of the earth as phase line or zero line. Grounding device Settings should be considered dry or frozen soil, etc. The influence of the seasonal change, and should comply with the regulation, grounding resistance shall conform to the requirements of the specification in the four seasons. But the impact of the lightning protection device grounding resistance value is only considering the influence of soil dry state in thunderstorm season. Grounding device of seasonal coefficient bits of value: Buried depth (0.5 m), the level of 1.4 1.4, the grounding body 2 3 m long vertical grounding body 1.2 1.4. Buried depth (m) of 0.8 1.0, the level of 1.25 1.25, the grounding body 2 3 m long vertical grounding body 1.15 1.3. Buried depth (m) of 2.5 3.0, the level of 1.0 1.0, the grounding body 2 3 m long vertical grounding body 1.0 1.1. PE line used material and phase line, zero line (N) at the same time, the minimum cross section should comply with the rules. PE line section relationship with the phase line cross section: Phase line conductor cross section S 16 or less (was), PE wire minimum cross section 5 (was). Phase line conductor cross section 16 35 (was), PE wire minimum cross section S / 2 (was). Protect the zero line must use insulated wires. Distribution equipment and electric machine connected to PE line should be the insulation of the cross section of not less than 2.5 was more strands of wire. Handheld electric tool PE line should be the insulation of the cross section of not less than 1.5 was more strands of wire. PE line installed switch or fuse is forbidden, forbidden by working current, and do not break. Phase line, N line, PE line color tag must meet the following requirements: phase line L1 L2 L3 (B) (A) (C), the insulation of the phase sequence of yellow, green, and red; The insulation of the N line color to light blue; The insulation of the PE line color for green/yellow double color. In any case it is forbidden to mix the color markers and substitute each other. Protection by zero In TN system, the following exposed conductive parts of electrical equipment is not charged should be protected by zero: Motors, transformers, electrical appliances, lighting appliances, handheld electric tool metal shell; Metal parts of electrical equipment transmission device; Power distribution cabinet and control cabinet of metal framework; Distribution equipment of the metal casing, frame and metal fence near the live part and metal door; Power line of metal protection tube, apply the line of wire rope, the base of the crane and the rail, the slippery rise template metal operation platform, etc.; Installed on the switch on the power line pole (tower), capacitors and other electrical device shell and metal stents. In TN system, the following can be exposed conductive part of electrical equipment is not charged, dont do protection by zero: In wood, as well as the asphalt conductive floor dry room, ac voltage 380 v and below the metal shell of the electric devices (when maintenance personnel may also touch electrical equipment metal shell and grounding metal objects except); Installed in power distribution cabinets, control cabinets, metal frame and metal cabinet on distribution box, and reliable electrical connections with electrical measuring instrument, current transformer, electrical metal case. Grounding and grounding resistance A protective zero line in addition to the TN system must be in the transformer room or the total distribution box do repeat grounding, must also be in the middle of the distribution system and do repeated earthing terminal. In TN system and protect the zero line every repeat grounding device of earthing resistance value should not be greater than 10 . At 10 in work allows the grounding resistance in the power system, the equivalent resistance of all repeat grounding should be not more than 10 . In TN system, it is strictly prohibited to separate zero line do repeat grounding installation work. Each grounding device grounding line should use more than 2 root and conductor, the difference and grounding system for electrical connection. Shall not adopt aluminum conductor earthing body or underground ground wire. Appropriate USES vertical grounding body Angle steel, steel pipe or smooth round steel, rebar shall not be adopted. Grounding available natural grounding body, but should ensure the electrical connections and thermal stability. Portable generators, electrical equipment of the metal shell, or the base shall be to the power of the generator grounding device has a reliable electrical connection. Portable generator grounding system should accord with the requirement of power transformer grounding system. The following circumstances will not protect meet another zero: Mobile generators and power consumption equipment fixed on the same metal stents, and do not supply other equipment utilization; No more than 2 sets of electrical equipment by a dedicated portable generator power supply, supply and electricity equipment spacing is less than 50 m, and between supply and metal casing of electrical equipment has reliable electrical connection. In a construction site with static electricity inside, to concentrate on mechanical equipment electrostatic grounding leakage measures should be taken. Each group set up static grounding body earthing resistance value should not be more than 100 , high soil resistivity area should not be greater than 1000 . Lightning protection In the region of the soil resistivity is lower than 200 * m pole is not another fortification thunder earthing device, but in the transformer room overhead into line or line insulator feet should be connected to the substation grounding device. Within the construction site, tic-tac-toe frame, gantry crane and other machinery and equipment, as well as steel scaffolding and under construction projects under construction of metal structure, when in the adjacent buildings, structures and other facilities outside the protection range of the lightning protection device by ShanQi, lightning protection device shall be installed in accordance with the provisions. When the highest mechanical equipment on the protection range of the lightning rod (ShanQi) can cover other devices, and finally to withdraw from the scene, the other equipment not fortification ray devices. Mechanical equipment and elevated facilities within the construction site need to install the rules of the lightning protection device: Regional annual average thunderstorm 15 or less (d), mechanical equipment height 60 or more (m); Regional annual average thunderstorm 15, 40 (d), mechanical equipment height or 32 (m); Regional annual average thunderstorm 40 or higher, 90 (d), mechanical equipment level 20 or more (m); Regional annual average thunderstorm 90 (d), or mechanical equipment height or 12 (m); Mechanical equipment or facilities of the lightning protection downlead can use the equipment or facilities of the metal structure, but should guarantee the electrical connections. Install the lightning rod (ShanQi) machinery and equipment, all the fixed power, control and communication, lighting, signal lines, appropr