Estimating Concrete Quantities – Module ID 23202

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Module ID 23202 – Reviews basic mathematical calculations for area and volume as well as metric conversions to prepare trainees for the module topic. A review of drawings and their interpretation is also provided, along with guidance for estimating the volume of concrete needed in placements of various shapes.

Points awarded on Course Completion – 12.5

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Overview

Estimating concrete quantities is an important part of the construction process. It is important that material estimates be as accurate as possible. When materials are overestimated, the remaining materials must be moved to another site, placed in storage, or wasted altogether, requiring more labor and increasing project costs. Underestimating, on the other hand, is also wasteful of time and results in a project that exceeds the budget. To prepare accurate estimates, one must be comfortable with math in general, and be able to read drawings to gather the needed information. This module provides an opportunity to practice the necessary skills and estimate concrete quantities for various structures.

Learning Objective 1 – Successful completion of this module prepares trainees to: Calculate metric linear and weight conversions and work with denominate numbers to determine area and volume.

• Convert linear measurements to and from the metric system.
• Convert weight values to and from the metric system.
• Make mathematical calculations with denominate numbers.
• Define square measurement and calculate the area of squares and rectangles.
• Calculate the area of various two-dimensional figures.
• Calculate the volume of various three-dimensional figures.

Learning Objective 2 – Successful completion of this module prepares trainees to: Explain how to interpret construction drawings and estimate concrete quantities.

• Identify and describe various parts of drawings.
• Identify and describe how to use various types of residential drawings.
• Explain how to calculate concrete volume and prepare a takeoff.
• Explain how to calculate concrete volume for specific concrete structures.

Based on an instructor-provided drawing, estimate the volume of concrete required for a slab-ongrade.

Based on an instructor-provided drawing, estimate the volume of concrete required for a vertical concrete placement such as a stairway or structural support column

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