What is the construction joint ? The setting of construction joints has an increasingly significant impact on the quality of the project. If the construction joints are improperly handled, they often form weaknesses, which have a great influence on the safety and waterproofness of the structure. What is the position of construction joints ? The following small series briefly introduces what the construction joint is and the location of the construction joint .
·What is the construction joint
Construction joints refer to the joints formed between pre- and post-concrete concretes due to design requirements or construction needs to be poured in stages during the concrete placement process. Therefore, the construction joint is not real, it is because the post-cast concrete exceeds the initial setting time, and there is a joint surface with the concrete that is poured first. This joint surface is called a construction joint.
·Construction seam retention position
The position of the construction joints shall be set at locations where the structure is subject to small shear force and is convenient for construction. Construction joints in different spaces have different indwelling positions and shall comply with the following provisions: Columns shall be left horizontally, beams, slabs and walls shall be left vertical Sew.
1. Construction joints shall be placed under the top of the foundation, below the girder or crane girder leg, above the crane girder, below the column caps of the beamless floor.
2. Join the slab with the large cross-section beam as a whole, and the construction joints should be placed 20mm to 30mm below the floor of the slab. When there is a beam under the board, stay in the lower part of the bracket.
3. For unidirectional plates with an aspect ratio of more than two to one, the construction joints shall be left in any position parallel to the short sides of the plates. At the same time, the construction joints shall be vertically indefinite, and they shall not be made inclining.
4. The slab with primary and secondary beam should be poured along the direction of the secondary beam. Construction joints should be placed within the middle 1/3 of the secondary beam span.
5. The construction joints on the wall shall be left in the middle 1/3 of the crossing span of the door opening, and may also be left at the intersection of the vertical and horizontal walls.
6. The construction joints on the stairs should stay at 1/3 of the tread board. The concrete of the stairs should be poured continuously. If it is a multi-story staircase and the upper floor is cast-in-place floor slab and not poured, the construction joint can be left; it should be left at 1/3 of the middle of the stair section, but it should be noted that the joint surface should be perpendicular to the axis of the stairs. direction.
7. The construction joints of pool walls should be left on the vertical walls 200mm to 500mm above the floor surface.
Information on what construction joints are and the location of the construction joints are introduced for everyone. I hope this article will help you. If you still have anything you don’t understand, you can follow our website and we’ll get back to you as soon as possible.
Construction installation decoration construction knowledge construction delivery construction contract
Bathroom accessory includes a range of Floor Drain , Robe Hook , Glass Holder, Soap Holder , Toilet Paper Holder, Toilet Brush Holder, tower bar, Towel Shelf and etc.
Bathroom Accessory,Rose Gold Bathroom Accessory,Bath Hardware Accessories Set,Luxury Bathroom Accessories
Kaiping Jenor Sanitary Ware Co., Ltd , https://www.kpjenorsanitary.com