Longitudinal and transverse joints shall be constructed as shown on the plans and construction joints wherever construction may require them.
Longitudinal joints are those joints parallel to the lane of construction. They may be either intermediate center joints or the construction joints between construction lanes.
Expansion joints may be either longitudinal or transverse. They are used only where specifically shown on the plans.
Transverse joints shall be contraction, expansion or construction joints.
The edges of the pavement and those joints where such edging is shown on the plans shall be rounded with an edger having a radius of 1/8 inch. Transverse joints, except keyed and tied construction joints, shall be continuous across the entire paved area including the curb.
10.1 EXPANSION JOINTS: Expansion joints, where shown on the plans shall conform to the specifications in Item 2.7.1 of Attachment A of these regulations. They shall extend the entire width of the pavement. They shall be of the dimensions and spacing as shown on the plans. The filler shall be held accurately in place during the placing and finishing of the concrete by a bulkhead, a metal channel cap or other approved method.
Under no circumstances shall any concrete be left above the expansion material or across the joint at any point. Any concrete spanning the ends of the joint next to the forms shall be carefully cut away after the forms are removed.
Before the pavement is opened to traffic, the groove above the filler shall be cleaned and sealed with specified joint sealing material covered under Item 2.7.2 of Attachment A of these regulations.
10.2 TRANSVERSE JOINTS: Transverse contraction joints shall be of sawed, formed dummy groove or premolded strip type. All transverse joints shall be 1/4 of the pavement thickness. The spacing of undoweled contraction joints shall be specified by the design engineer and shall be based on accurate performance records from streets in service. In no case shall the contraction joints be spaced at intervals greater than 20 feet. In the event that coarse aggregate consists of Calcareous gravel, Siliceous gravel, gravel smaller than 3/4 inch and slag, the joint spacing shall not exceed 15 feet. In the event that distributed steel is used, an alternate joint spacing shall be permitted as specified by the design engineer and approved by the Planning Commission, or its duly authorized representative.
If sawed joints are specified on the plans, they shall be sawed early enough to control cracking, but late enough to prevent any damage by blade action in the slab surface and to the concrete immediately adjacent to the joints.
10.3 CONSTRUCTION JOINTS: Transverse construction joints of the type shown on the plans shall be placed wherever the placing of concrete is suspended for more than 30 minutes. A transverse construction joint with smooth bars shall be used if the joint occurs at the location of a contraction joint. Keyed joints with tie bars are used if the joint occurs at any other locations.
10.4 LONGITUDINAL JOINTS: Longitudinal joints shall be placed as shown on the plans. They shall be of the sawed, dummy groove, premolded strip or the keyed construction type. All longitudinal sawed joints shall conform to Item 10.2 of Attachment A of these regulations. Joints between construction lanes shall be the keyed construction type. The depth of longitudinal joints, except for construction joints, shall be at least 1/4 of the pavement thickness. They shall coincide with lane markings wherever possible and shall be provided between each traffic lane.
10.5 INTEGRAL CURB JOINTS: In the construction of transverse joints of concrete integral curb pavement, special care must be taken to see that all transverse joints extend continuously through the pavement and curb, except tied transverse construction joints.
(Ord. 1971-2, passed 4-6-71)