7−20 bearing blocks, headwalls, and other miscellaneous purposes at locations designated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 709.02 MATERIALS. The classifications of concrete for thrust blocks, headwalls, and other miscellaneous purposes shall be as set forth in Table I of Subsection 601.01.1 of these Specifications. Such concrete shall also conform to other applicable requirements of SECTION 601; PORTLAND CEMENT CONCRETE , of these Specifications.
709.03 CONSTRUCTION METHODS. 709.03.1 Thrust or Bearing Blocks. Concrete thrust or bearing blocks for backing up tees, bends
and hydrants shall be installed at designated locations or as directed by the Engineer. Installation of thrust blocks shall include the placing of concrete and any additional excavation as required. Straps associated with thrust blocks shall likewise be provided. 709.03.2 Headwalls . Concrete construction shall conform to the applicable requirements of SECTIONS 808 and 702; CAST-IN-PLACE STRUCTURE CONCRETE MASONRY and MANHOLES, INLETS AND CATCH BASINS , respectively, of these Specifications.
709.04 METHOD OF MEASUREMENT. "Concrete" for the purposes specified in this Section will
be measured by the number of cubic yards of such material actually placed in accordance with the Plans and/or as directed by the Engineer. 709.05 BASIS OF PAYMENT. The accepted quantity of "Concrete" used for thrust or bearing blocks, headwalls, or for any other miscellaneous purpose will be paid for at their respective contract unit prices per cubic yard as listed in the Proposal. The prices so-stated constitute full and complete compensation for all l abor, materials, and equipment, and all incidentals required to finish the work, complete and accepted by the Engineer.
710.01 DESCRIPTION. This work consists of cutting into existing manholes, catch basins, and
pipe to accommodate new construction at locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 710.02 MATERIALS. Materials for brickwork shall conform to the applicable requirements of Subsection M.04.03. of these Specifications. 7−21710.03 CONSTRUCTION METHODS.
710.03.1 Manhole and Basin Cut-Ins. The existing manholes and/or catch basins shall be cut
into at the grade shown on the Plans. The cut-in shall be made with the approval and acceptance of the Engineer. Overbreakage shall be restricted to not more than 2 inches beyond the outside circumference of the connecting pipe. Brick shall be laid as headers on edge around the pipe and mortared in place. Excavation for cut-ins shall be carried out in accordance with the applicable requirements of SECTION 205; TRENCH EXCAVATION , of these Specifications. The outside face of brick walls shall be plastered to a thickness of ½-inch with mortar proportioned as specified herein. Mortar shall be troweled to a smooth hard finish and no backfill shall be placed until the mortar has thoroughly hardened. 710.03.2 Pipe Cut-Ins. Pipe cut-ins shall be made at locations where a new manhole or catch basin is to be inserted on an existing line. Pipe cut-ins shall be performed by either of the following methods:
a.Cutting the Pipe Prior to Performing Any Work in Constructing the New Manhole. In exercising this option, the Contractor shall provide the Engineer with the methods he contemplates on using to maintain the flow or service provided by the pipe to be cut. The Contractor shall receive approval from the Engineer prior to commencing work.
b.Constructing the Manhole on and Around the Pipe Prior to Making the Cutting. Under this method, the Contractor shall excavate around the pipe to the outer limits of the new manhole. The pipe shall be supported and braced in an approved manner to insure against breakage or misalignment that will result in leakage. The Contractor shall obtain approval from the Engineer regarding the method for handling the pipe flow should breakage occur. The manhole invert may be constructed using the lower half of the existing pipe. Jointing between the pipe and manhole wall shall be watertight. Excavation for pipe cut-ins shall be carried out in accordance with the applicable requirements of SECTION 203; STRUCTURE EXCAVATION AND BACKFILL , of these Specifications. 710.04 METHOD OF MEASUREMENT. Not applicable.
710.05 BASIS OF PAYMENT. 710.05.1 Manhole and Catch Basin Cut-Ins. Payment for "Manhole and Catch Basin Cut-Ins" will
not be made separately but will be included in the contract unit price per linear foot of the particular pipe involved, as set forth in SECTION 701; CULVERTS AND STORM DRAINS , of these Specifications. 710.05.2 Pipe Cut-Ins. Payment for "Pipe Cut-Ins" will not be made separately but will be included in the contract unit price per each of the particular drainage structure involved as set forth in
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 326–327 of 826.