On the wire frame, the center wires are connected by thin steel wires, and then the theodolites are set on the observation points and the geometric center line control points on the ground respectively, and the control wires are cast onto the wire rack. The self-made horizontal length ruler requires the tolerance of the center distance of the anchor bolt to ensure the accuracy of the month. With a channel steel, the civil engineering construction management office from the one end of the channel steel uses the steel ruler to accurately measure the distance between the center distances of the bolts. The number of measurements is secondary, and the temperature is corrected, and then the average value is taken. Use a knives to engrave the thin line, which is the horizontal distance between the bolts.
Then take the distance from the left to the right for calibration, engrave the thin line as the center line of the mixed iron furnace and then use the steel ruler to measure the center position of each bolt design on the channel steel in turn. And engraved with a thin line, used as a horizontal length ruler after being verified. A thin steel wire is hung on the extension line of the center line of the two rows of bolts of the bracket beam, so that the two ends are respectively placed on the wire frame beam corresponding to the center line of the beam so as to be parallel with the center line of the bracket beam. Taking the center line of the beam as the reference, the distance between the center line of each distance and the center distance of the bolt is measured, and the error should be within. The method of checking the steel wire of the support beam is composed of two rectangles, and the distance between them should be equal, which is equal to the diagonal length.
The bolt positioning method takes the bolt positioning of a column as an example, and the two ends of the self-made horizontal length ruler are placed on the wire frame beam, and the center line point of the bolt on the support beam is coincident. The height of the bottom surface of the wire frame beam is higher than the height of the top surface of the bolt. Level with a precision level to ensure a horizontal level top surface.
Hebei Yuanbai Technology Co., Ltd. , https://www.yuanbaikeji.com