02-11-1985 Council Packet - Laserfiche WebLink

Home Browse Search

All manholes, catch hasin manholes and catch basins shall be constructed in accordance with the detail plates included in the contract documents. Where manhole or catch ha.sin depths are less than h.5 feet from rim to top of Pipe, they shall be built with precast concrete manhole sections and a precast concrete manhole slab with offset openink suitable for street loading. Where manholes are constructed using a precast concrete manhole top sla11, the pre -cast section immediately below the slab shall he on (1) foot in height. "Mini -Tee" type precast manhole bottom sectinne m.v he used for the installa- tion of all small diameter concrete pipe Fewer'; in lieu of the construction method descrihed above. 24,000.2.K. PRF-CAST SEGMF:NTAI. BLOCK: Eight inch precast segmental radial block may be used fur the lower portion of manhole over large diameter pipe and for shallow manholes and catch hasins. Concrete used in the manufacture of these blocks shall conform to the requirements of A.S.T.M. "Specifications for Concrete h Masonry 1!nits for Cronstruction of Catch Basins 6 Manholes", Serial Designation C-139. The exterior of all block manholes shall be plastered with one-half inch of mortar .-as per Paragraph 24,000, s,.C. 74,000.2.I,. CONCRF'TE__MAT_ERIALS: Concrete for monolithic concrete manholes and all manhole base. shall consist of Stdndard Portland Cement Ttipe 1, .:lean wa.hed sand and crushed rock and gravel free from deleterious materials. Portland cement shall conform to A.S.i.M. Specifications, Portland Cement Tvpe I, Standard Serial Designation G-15p. Gradation shall be subject to the ap- proval of the Engineer with proper water -cement ratio to obtain a concrete testing not leha than 3000 pounds per square inch in 28 days. 2 1000.2.M. MORTAR_ MATERIALS: Mortar used for laving up concrete block or brick manholes or used for plastering lift holes and exteriors of manholes shall consist of Standard Portland Cement Tvpe I, Standard Serial Designation C-150. Lime shall conform to specifications for normal finishing hydrated lime, A.S.T.M. Serial Designation C-6 or specifications for hydraulic hydrated lime for structural purposes, A.S.T.M. Serial Designation, C-141. gradation shall he subject to the approval of the Engineer. 24,000.1. CONS'CRUCTION REQUIREMENTS. 24,000.3.A. INSPECTION: 24,000.3.AI Of Materials at Factory: All materials, whether furnished by the Owner or by are subject. at the discretion of the Chrner, to inspection and approval At the plant of the manufacturer. 24,000.1.A2, tof Materials at Deliverer Point: During the process of unload- - — _- -- -_ ing, all pipe ao a esenries shell he ►-r---nspe-cted by the Contractor for loss or damage in transit. No 0,ipment of material shall he accepted by the Contrac- tor not i 1 (�r lonle®n notation of Any to-t or damaged material shall have been ~ made on the hill of lading by the agent of the carrier. I., , W)rr-4 2 / 84/45`i4h CnpvriRht 1984 Konrstr,,I�, R.,sene, An•ler 1 ok 6 Associates, Inc.