INSTRUCTIONS FABRICATION AND TESTING
FRAME REBAR I / General Rules: All materials must not be rusty - Area cross section must be consistent and not have any disability. - After production, the material should not have the wrong way. Except for the curve, the line cut perpendicular to the axis of the steel bar. --The Air must be cut with a straight fit cut mold - cutting and bending the heat used to be conducted under proper temperature. The material must be cooled by measures will not affect the physical properties and chemical properties of the materials. II / Guiding fabrication, inspection reinforced frame: APPLICATION REQUIREMENTS 1.THAO WORK AND INSTALLING REBAR: Everywhere, all reinforcement must be protected to avoid mechanical damage or damage to the surface, rust or other causes from time ratings wait until fitted put. Reinforced stored at the site must be left on the floor or a wooden frame with a reasonable distance so as not to have any reinforcement located above or in contact with the ground. When the weather is dry and storage time prior to installation restrictions, may not be stored in the house, but if there is rain or other wet weather occurs or predictable, the bars must be kept under the sheets cover. 2. QUALITY OF REBAR AND SUPPLY - The representative sample of all rebar used in the plant must be submitted before work starts to Engineering consent in writing, together with the certificate of Manufacturer clearly announced production site, date and size of shipments to factory, and all the details related to the composition, manufacturing process, intensity and other quality indicators of steel . -In the case at any point reinforced when laboratory sample does not meet the requirements of technical standards, or technique that samples were sent for laboratory technique is not really representative sample is, or if visible is reinforced not approved to be used for production, the Engineer may instruct beat out all the construction work volume that uses reinforced that. - All applicants rebar testing must meet the requirements and the limits prescribed by the ASTM / AASHTO of sizes, types and separate any additional requests otherwise. 3. LIST AND MAP OF BENDING THANH Technical Department must provide detailed checklists and rebar bending diagrams for Engineering for review. The process will not be started until the list above be approved. 4. OUTSOURCING: Frame ring - A ring of steel lines for all areas can be arranged by two layers with thickness pipe 180 mm or smaller bodies of three layers with a thickness of 180 mm or larger body. The distance between the layers must not be greater than the thickness of 6 mm a vertical bar. All classes will be fixed together to make a steel frame. Other technical requirements for the rings, welds, reinforcement placement inside the tube, etc ... will be applied to this method of creating reinforcement. - As reinforcement ring is used, the placement of it will be in the range of 35-50% relative thickness from the surface of the inner tube, unless relatives thickness smaller than 63 mm, thickness of concrete protection for themselves against reinforced along the pipe would be 19 mm in both horizontal position and vertical. - With two road reinforcement tube rounds, their position must be set so that each line will have a protective layer coating the outside of the reinforced concrete pipe along the body of 25 mm. - With elliptical tube reinforced with thickness 63mm or larger body, the reinforcement must be arranged so that the outer protective layer remains along the barrel is 25 mm from the surface of the pipe in position diameter 25 mm vertical and from the outer surface of the pipe in diameter horizontal position. In elliptical tube reinforced with 63mm thickness smaller body, the protective layer of concrete will be 19 mm in diameter both vertical and horizontal. - Deviation reinforced mounting position will have to comply regulations on allowable variation in size. - The distance between the center ring reinforcement should not exceed 100 mm for pipes up to 100 mm thick body, this distance does not exceed a thickness relative to the drain big, and never exceed 150 mm reinforced -When not extend along the body tube connected to district, along the maximum length of all aggregate hook head is 75 mm, unless this gap has reached the half-way thick barrel, barrel will contain at least a total area of reinforcement of a minimum area prescribed for each meter long pipe. Minimum length for longitudinal bending rod hooks will be 13 mm. 's place inflection point along the rod hook, the coating will be 13 mm if there is bending hooks and 6 mm without bending. - Location and continuity of reinforcement ring is not damaged during construction tubes, unless the consent of the customer, enabling the hook or the hole in the tube for transportation purposes. - If the joints are not welded, reinforced by the evil will be forced steel string section of a length not less than 20 times the diameter of the rebar and rebar to be bent cold in place construction, 40 times the diameter for smooth reinforced and cold drawn steel. With the tie the rebar welded frame, the connection will be forced vertically arranged reinforcing threads. - When the joints are welded and are not required under the aforementioned minimum requirements, the test must pull reinforcement steel welding on a sample and at least reaching the 50% minimum intensity of the background and section steel welding husband is 50 mm minimum. With butt welds, are only allowed to use the spirals, the experiment would have to pull all the aggregate at least 75% reaches the minimum prescribed intensity for steel * Reinforced vertical reinforcement ring road -each grafted enough composition of vertical bars, to maintain the correct format and reinforced place. When reinforced vertical coupling, the line in the vertical focal core, the line or the spacing on belt after concreting will not way out. - Frame connector length of reinforced areas used connections here means that the length of the first inner bending or outside of the segment length from the shoulder down the hook end of the tube. The last gap in the circle or the coating will be applied to end any point on the circle of core tube or connector. When twisted rebar used the distance and this area will be reinforced from the nearest point on the twisted end of the pipe, unless other thing is customer permission, the following requirements on remains connected to the application: - Reinforcement steel connector pipe joints with rubber cushion - With 900 mm pipe diameter or larger, square head or head bending bending hooks will be rolling steel rings. The reinforced system will be created from an extension of the steel cage, or be created by a separate steel cage with half the cross section than the cross section steel cage defined for the application, is less. - If reinforcement requirements square crimp or bend the hook, the maximum thickness of the coating will be reinforced in the first half length or 75 mm connector. - Frame with connections fitted with rubber buffer washers - With 300 mm pipe diameter or larger, the system will be reinforced round. The reinforced system will be hinged on an outer ring, or ring alone, often less, or may be a separate ring is spaced at least 01 meters along the barrel as required at. If a separate rings are used, the belt must extend at least 25 mm more than the length of the circumference as required by it for the first bending jig square can certainly connect with it at the head tube. * BENDER : Bar reinforcement must be cut and bend in the shape shown in the drawing. All the bars have been bending cold, unless permitted otherwise. * HOOK AND BENDING SIZE: The size of the hook and bending diameter is measured at the bar inside the right as shown on drawing. * BENDING AND NEO -Each rebar cutting and bending to the size specified in the drawing -For the bending rebar, in each case to follow the manufacturer's recommendations. All the bars have been bending cold. All the bars need to be bending bending matching process American Concrete Institute's details unless stated otherwise. Must use qualified workers to cut and bend, and must provide the appropriate equipment for this job. 5. FIXED REBAR reinforcement must be installed on the shape and size as shown in the drawing. -The Bar sections have already been pointed out and must be fixed tightly and accurately in the formwork at the location shown in the drawing. The bar must be forced, welded together on site to make sure the intersection to ensure kh protruding concrete facade. - At the time of concreting, all reinforcement must be cleaned thoroughly
đang được dịch, vui lòng đợi..
