To control the elevation of a building, contractors must use or establish one or more benchmarks near the building site. In this example, benchmark A (BMA) is located some distance away from the site and the contractor wants to establish benchmark B (BMB) near the site. Therefore the contractor must: (a) Transfer the elevation form BMA to establish BMB using a technique known as differential levelling (see sketch below) (b) Confirm the accuracy of the work by 'looping' back to BMA or by completing a 'circuit' to another known benchmark - in this case BMC (c) Check the mathematical correctness of the work as well as determine if the work falls within acceptable limits of 3.826 BMA ELEV. 220,000 |HI = 000022 /2.549 0.841 ΤΡΙ ELEY= HI DATUM LINE = 0.000 0.583 BMB ELEV.= HI 2.681 ELEV 1.202 TP2 HIF 66 BMC ELE/-222,226

To control the elevation of a building, contractors must use or establish one or more benchmarks near the building site. In this example, benchmark A (BMA) is located some distance away from the site and the contractor wants to establish benchmark B (BMB) near the site. Therefore the contractor must: (a) Transfer the elevation form BMA to establish BMB using a technique known as differential levelling (see sketch below) (b) Confirm the accuracy of the work by 'looping' back to BMA or by completing a 'circuit' to another known benchmark - in this case BMC (c) Check the mathematical correctness of the work as well as determine if the work falls within acceptable limits of 3.826 BMA ELEV. 220,000 |HI = 000022 /2.549 0.841 ΤΡΙ ELEY= HI DATUM LINE = 0.000 0.583 BMB ELEV.= HI 2.681 ELEV 1.202 TP2 HIF 66 BMC ELE/-222,226

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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