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Differences between the NRA method of measurement and CESMM3 - Assignment Example

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High school
Engineering and Construction
Pages 5 (1255 words)


Name: Instructor's name: Course: Date: Differences between the NRA method of measurement and CESMM3 Civil Engineering Measurement 1. Class E (Earthworks) In CESMM3, all measurements are in cubic meters and the activities include; I. Excavation II. Dredging III…

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Differences between the NRA method of measurement and CESMM3

Piles V. Foundations for traffic signs VI. Foundations for fences and gates VII. Tunnels, shafts, headings and other subterranean cavities. The types of excavation available are dredging, cuttings, foundations and general. Their depths also vary depending on ground material. For; I. Top soils, the depth should not be more than 0.25m. II. Firm ground to range between 0.5-1.0m. III. Any surface initially exposing hard material, a depth of 1-2m (CESSM3, 1991 p.34). NRA works on an assumption that one cubic meter of excavated material equals one cubic meter of compacted material. The measurement is done for; I. The topsoil 5A II. Cutting and other excavation III. Surcharge removal IV. Structural foundations V. Foundations for corrugated structures that are buried. The required depth is; I. 0-3 meters and II. 0-6 meters or more in steps of three (National Roads Authority 2000 p.92). 2. Class F: In-situ concrete All measurements are in cubic meters for CESMMA3 and NRA. According to CESMM3, measurements for in-situ concrete exclude; I. Capping of boreholes II. Diaphragm walls III. Excavation ancillaries IV. Granolithic and other applied finishes V. Drainage and pipework VI. Piles VII. Roads, pavings and kerbs VIII. Tunnel and shaft linings IX. Foundations for fences and gates. The concrete has different design mix. Various thicknesses are indicated in the placing of concrete. For blinding, a thickness of not greater than 150mm is allowed. ...
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