Site Layout Two: Angular and Distance Measurement – Module 27402-14

Site Layout Two: Angular and Distance Measurement – Module 27402-14

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Module 27402-14 describes the principles, equipment, and methods used to perform angular and distance mea- surements. The use and care of laser instruments, transit levels, theodolites, electronic distance measurement, and total stations are covered.

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Description

Objectives

Learning Objective 1 – Complete calculations pertaining to angular measurements.

  • Identify common elements of plane geometry.
  • Use the Pythagorean theorem and right-

    triangle trigonometry to determine unknown values.

  • Convert angular measurements stated in decimal degrees to degrees, minutes, seconds, and vice versa.

Learning Objective 2 – Identify, safely use, and properly care for site- layout tools and instruments.

  • List safety hazards associated with site layout.
  • Identify distance measurement tools and equipment.
  • Identify site-layout instruments and equipment.
  • Describe the use of GPS devices for construction projects.
  • Describe the initial setup and adjustment of a transit level or theodolite.

Learning Objective 3 – Lay out building lines using traditional and radial layout techniques.

  • Describe field checks for surveying instruments.
  • Explain how to measure distances by taping.
  • Describe how to measure horizontal and vertical angles.
  • Explain how to lay out building lines.
  • Describe additional distance and direction systems as they pertain to building layout.

Performance Tasks

Performance Task 1 (Learning Objective 1) – Perform calculations pertaining to angular

measurements.

Performance Task 2 (Learning Objective 2) – Identify, safely use, and properly care for site-

layout tools and instruments.

Performance Task 3 (Learning Objective 2) – Read transit level/theodolite scales and

verniers.

Performance Task 4 (Learning Objective 3) – Use a transit level to lay out building lines using traditional and radial layout techniques.

 

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