Description

Overview

Concrete is one of the most versatile of all structural building materials, and one of the most useful because it is durable, strong, fire resistant, and economical. Due to its plastic fluid nature before it cures, it can be molded to almost any form or shape. It is typically the material of choice for curbs and gutters, stairs, sidewalks, patios, and driveways. In areas subject to freeze-thaw conditions, airentrained concrete should be used for these exterior structures. This module describes the procedures and techniques used in constructing some common site-built structures.

Learning Objective 1  Successful completion of this module prepares trainees to: Explain how to construct curbs and gutters.

• Explain how to read site plans and establish the grades and subbase.
• Explain how to construct curb and gutter forms.
• Explain how to place, finish, and cure concrete curbs and gutters.
• Describe slipforming and how it is used to construct curbs.

Learning Objective 2 Successful completion of this module prepares trainees to: Explain how to construct site-built concrete steps.

• Explain how to layout concrete steps and determine the rise and run.
• Explain how to form, place, and finish concrete steps on grade.
• Explain how to prepare, place, and finish metal-pan step assemblies.

Learning Objective 3 Successful completion of this module prepares trainees to: Explain how to construct walks, drives, and patios.

• Explain how to layout, stake, and prepare the subgrade for walks, drives, and patios.
• Explain how to set the forms for walks, drives, and patios. c.Explain how to place, finish, and cure walks, drives, and patios.

Performance Tasks

• Lay out, align, and set prefabricated forms to grade for a section of curb and gutter.
• Lay out a 4′ radius outside curve and set construction stakes for curb and gutter formwork.
• Place and finish the concrete for a curb and gutter.
• Given the total rise and run for a set of steps, calculate the tread and riser dimensions.
• Build wood formwork for a three-step (minimum) set of steps on grade with a top landing.
• Place and finish the concrete for a three-step (minimum) set of steps with a top landing