steel structure warehouse installation. Construction method: the engineering steel structure installation, first of all review the axis and the basis of the top surface of the concrete foundation elevation points Lifting the first lifting of all steel columns, be corrected, fixed grout, in turn lifting the first floor to the five-story steel beams, with hanging with the adjustment, and then to install fixed, and finally lifting the roof support and purlin system. 2. Construction sequence: Live hoisting divided into two construction unit, each unit, respectively, to conduct an independent operating unit with a 50-ton crane, lifting by 8 axis to an axis from east to west, the unit using 50 tons crane by 9-axis to 15-axis from west to east, lifting, hoisting see hoisting plan in order. 3 pre-installation preparation. The the column bolt construction: review the construction of civil foundation column foot positioning axis, buried anchor bolts. To ensure accurate positioning of the anchor bolt, anchor bolts steel template hole sets fixed positioning, and repeatedly checking correct only after the pouring of concrete construction. Anchor bolts exposed part of the ground with plastic sheeting wrapped protection. . Preparation of installation plans and components supply plan, organize construction.
. Check the steel components: steel components factory should have factory certification, drawings the enumeration for review components before installing the components shipped in accordance with the order of installation to installation within not affect the installation conditions, try to members on the installation location below , in order to ensure ease of installation. ④. Standard section of the installation process ⑤. Installation quality standards for the project name to allow deviation the verticality single column buildings overall H/100, ≤ 10mm elevation Liang surface L/1000 and to ≤ 10mm capitals ≤ 5mm building height ± n (△ n + △ n + △ w) 4. Installation and construction process. Steel columns installed: the hoisting First determine the components hanging position, determine the banding method, good protective measures when lifting. After the lifting of the steel column, when the column foot away from the anchor bolts about 30-40CM righting the column foot mounting holes bolt, slow off the hook in place. After the beginning of the school is to be vertical deviation in 20MM, tighten the bolts, temporary fixed can be decoupled.
②. Steel girder lifting: steel girder lifting after the completion of the review in the pillars, and two points symmetrical lashing lifting in place to install steel beams when lifting. From the column datum 100MM steel girder lifting slowly slow in place until the steel beams hoisting butt adjustment correction, and then fixed connection. The steel steel structure warehouse lifting with hanging with theodolite correction, feel free to correct deviations. ③. Purlin installation wall: purlin sectional area is smaller, lighter weight, using a hook hanging method hoisting or lifting into pieces. The purlins correction pitch size and flatness. Pitch inspection sample rod along the purlin rod moves back and forth between any error, relax or tighten the bolts to be corrected. Flatness correction with cable and steel rule checks, and finally bolted. 5. The installation corrected ①. Steel columns correction: vertical steel columns degree correction using theodolite or hanging wire hammer test, using the jack when there is a deviation to be corrected, and elevation correction jacks on the base a little elevated, and then increase or decrease the pad thickness correction is correct, the column foot immediately after tight solid anchor bolts until the steel columns overall correction the correct pouring fine stone concrete fixed in the column under the soles of the feet. ②. The steel beams correction: steel beam axis and vertical degrees of measurement correction, correction jack and pour chain fixed immediately corrected. 6. The construction of high-strength bolts ①. High-strength bolts in the pre-construction material certificate (quality assurance) must retest must do before using. ②. High-strength bolts designated persons management safekeeping, shall not abandonment, not bruised bolts and contaminated dirt to prevent the torque coefficient changes during the installation process.
③. High-strength bolts to moisture, corrosion. ④. Application the bald the crowbar and rushed nails is up and down (or around) the connection plate screw holes so bolts can freely invest mounting bolts. ⑤. Connecting plate screw holes of error should check the discretion, if they are to adjust the screw holes invalid or the rest of the the local screw holes malposition, electric reamer or manual reamer punch. ⑥. Connected on the same surface, high strength bolts shall be invested in the same direction, should the day end after the installation of the high-strength bolts screwed completed. (B). Wall pressure type color plates installed. ①, pre-construction preparation prior to the construction and installation of steel sheeting envelope, ordered the construction drawings, design and construction personnel, technical training and production safety tests, and in accordance with the design documentation organization. ②, according to the file details check specifications and quantities of various types of materials, the damaged steel sheeting, flashings board shall promptly repair and replacement. ③, various types of construction equipment should be complete and normal operation. ④ review with steel sheeting construction installed on steel components installed accuracy, clear purlins installed weld drug skin and spatter, brushing and anti-rust paint anti-corrosion treatment. 2. Pressure-type color board construction process: the wallboard installed purlin position from one end to begin between the board and the board must clench, and then screw the wallboard seams waterproofing. Installation of steel sheeting, side laying side to adjust its position, while fixed. (C) floor bearing plate installed prior to the installation of the floor bearing plate construction, draw the corresponding row board diagram, in accordance with the construction drawings. Began laying steel sheeting along one end of the floor, while laying side to adjust its position, edge fixed. In case of the hole at first to install the pressure plate, then cutting the hole size based on the actual hole location. Stud connections combination connected from the floor beams with reinforced concrete floor, construction pull arc stud welding machine (Model: YD-200LS) and gun (Model: YS-223G), and use the deoxyribonucleic arc resistance thermal ceramics seat. Welding method: Turn the welder torch power the cylindrical pegs set in the torch, arc-proof seat and start welding torch, current fuse, arcing seat, the top tight base material by a short cylindrical pegs to a certain speed melting an end portion, the completion of the cutting power columnar stud welding is fixed on the base material. Stud welding inspection: columnar pegs the quality of hammering, supplemented by the appearance of surface inspection, take 1/500 per day production bending checks, no weld fracture considered qualified, such as weld cracks The peg sentence is scrapped, need to re-welding in the vicinity of a columnar nail as a supplement. VII. Quality assurance measures????? Company adhere to the "user is God, quality of life," the quality policy, seriously operation GB/T19002-9002 quality management model, quality supervision of the different types of work and every process, so that the construction process materials, semi-finished products, finished products quality under controlled conditions, so that the quality of the project are effectively guaranteed fundamentally.
Process quality assurance measures. Steel production: 1.1 This structure chosen steel factory certificate and the original data, and requirements into the plant must be after retest qualified, before use of steel. 1.2 good selection, use fully functional processing equipment, requiring factory production part of the H-beam flange plate using single-sided 45-degree bevel butt, web-sided 45-degree bevel miter. 1.3 Electrodes should have factory certification or material report, welding electrodes applied before drying oven for drying, use submerged arc wire and flux then selected must steel structure warehouse matched with the base metal. 1.4 Upon completion of the production of components of this steel in need of shot blasting, primed requirements rust within 24 hours, using stencilled primer, the paint film thickness to meet design requirements. 1.5 All operators must be performed in strict accordance with the technical, quality, safety tests, content requirements of welding personnel must be certified. 1.6 This steel structure steel requires welding of butt welds subject to ultrasonic flaw detection test, the detection level for the two. 1.7 steel structure to improve the accuracy of system holes hole drilling molded. Drill made of medium carbon steel is applied, shall be quenched the the jig bore diameter should be higher than the design aperture 0.3MM, jig thickness should not be too large, generally with 15MM. 1.8 In order to ensure the production of precision steel components material when preamplifier shrink the amount of pre-big bang may be depending on the size of the workpiece,
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