Construction Joints. All contraction joints shall be straight, truly vertical or level, as the cast may be, of the profile shown and formed in the exact positions shown on drawings or if not shown on the drawings, with prior approval of the Engineer. Vertical joints shall be formed against adequately secured rigid stop boards having splayed fillets, designed to pass the continuous steel reinforcement without temporary bending or displacement. The rate and method of placing concrete and the arrangement of constructions joints shall be placed in a continuous operation. Joints in reinforced slabs, joists and beams, shall be perpendicular to the axis or surface of the member jointed and at the center of the span. If an intersecting member occurs at that point, the joint shall be located at a point of minimum shear. Construction joints in columns shall be as shown on the drawings. Whenever it becomes necessary to stop work, such stops shall be located at center of slabs and of beams or as directed by the Engineer. An adequate and acceptable key for succeeding work shall be formed by using stop boards which shall be constructed tightly to prevent any grout leak. As early as possible boards shall be removed and the surface thoroughly hacked and brushed to remove all laitance. Any leakage past stop boards shall be hacked off as soon as the concrete has set. The surface shall be left clean and dry. Immediately prior to further concreting the joint face shall be soaked with water and covered with sand cement mortar of proportions identical to that in the concrete to be placed, punned into the body of the set concrete. For exposed finishes, care shall be exercised to preserve an unbroken line at the exposed edge of the joint. In no circumstances shall the concrete be allowed to finish at a break running down a rough slope. Such cases, if found, will be treated as contrary to the specification and the Contractor will be required to cut out the member and re- cast. In the case of horizontal joints, any excess water and laitance shall be removed from the surface after the concrete is deposited and before it has set. Before casting slabs the haunching or seating for the slab shall be thoroughly hacked, sourced and washed and covered with at least 5 mm of mortar immediately before the slab is cast. Any necessary construction joints in foundations shall be stepped and lapped 600 mm. Joint faces shall be prepared and treated as described, above Specification Concrete Work
Construction Joints. Locate joints not shown or specified so as to least impair strength and appearance of the work. Place concrete at such a rate so surfaces of concrete which have not been carried to joint levels will not have attained initial set before additional concrete is placed thereon.
Construction Joints. Definition: Concrete surfaces, upon or against which concrete is to be placed and to which new concrete is to adhere, that have become so rigid that the new concrete cannot be incorporated integrally with that previously placed, are defined as construction joints.
Construction Joints. Add the following to Clause 5.5.7:
Construction Joints. All construction joints in retaining walls shall be provided with a keyway and a waterstop. Keyway shall be as indicated on the plans or as specified by the Engineer.
Construction Joints. All construction joints in retaining walls shall be provided with a keyway and a waterstop. Keyway shall be as indicated on the plans or as specified by the Engineer. Weep Holes. Weep holes shall be provided through all structures as indicated on the plans and as directed. Ends of weep holes that are to be covered by filling material shall be protected by
Construction Joints. Construction Joints In Walls Or Footings Construction joints may only be placed where shown on the drawings or to the approval of the Engineer. The entire contact surface along the joint in the concrete already cast shall be chipped or water jetted to expose the coarse aggregate to 5 mm beyond the surrounding matrix. Care shall be taken to ensure that the concrete structure is not damaged and that all loose material is removed. The surface must be thoroughly cleaned and wetted before casting against the joint. • All construction joints in the reservoir walls and footing shall be cast with water stops. Water stops shall be rubber, as per detail drawings. Payment shall be per linear meter. The rate shall include the cost of all material and labour for the construction of the joint as indicated on the drawings, including formwork, testing and making good. Rates shall also include the cost of the supply and placing of any waterstops, dowels or other insets.
Construction Joints. Install so strength and appearance of concrete are not impaired, at locations indicated or as approved by Architect.
1. Place joints perpendicular to main reinforcement.
2. Continue reinforcement across construction joints unless otherwise indicated.
3. Do not continue reinforcement through sides of strip placements of floors and slabs.
Construction Joints. Minimize the number of longitudinal and transverse construction joints. Thoroughly clean both types of joints by blast cleaning. Coat the hardened sides of the joints with an approved bonding agent before fresh concrete is placed. When necessary, form longitudinal construction joints vertical by use of a header secured to the deck. After removal of the longitudinal header and transition, saw the overlay 3 in. (75 mm) or more inside the construction joints and the overlay outside the saw cut removed before the adjacent overlay is placed. The volume of the overlay removed is not included in the volume measured for payment.
Construction Joints. They shall be either keyed or dowelled, with or without angle iron. However, chuted concrete allows the concreting of large surfaces without needing to form construction joints.
