On-Demand Course: Joints in Slabs-on-Ground - Avoiding Floors That Live in Infamy

Price: $ 39.00 USD

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INSTRUCTIONS: View the recorded webinar. Complete 10-question quiz with a score of 80% or higher to receive a certificate for 0.10 CEU (equivalent to 1.0 PDH).

Continuing Education Credit: 0.10 CEU (1.0 PDH)

Approved AIA and ICC

Access Period: 30 days


Joints in slabs-on-ground are the weak points in the floor. They’re intended to allow movement. Construction or isolation joints are the slab edges. And contraction joints are installed to weaken the slab at locations where tensile restraint stresses are relieved as cracking beneath the joints. But these joints must be designed and detailed properly to provide the serviceability desired. This webinar will cover the basics of joints in slabs-on-ground and how to detail them to provide long-term performance. Minimizing random cracking as well as controlling crack widths will be discussed. Strategies to extend joint spacing and the concept of enhanced aggregate interlock will also be reviewed.

This is a recorded webinar from December 7, 2021.


Document Details

Author: Scott Tarr

Publication Year: 2021


Categories: Cracking, Joints, Slabs

Formats: Online Learning

Table of Contents

Learning Objectives:

1. Explain the purpose of joints in slabs-on-ground and how to determine the proper joint spacing needed.

2. Discuss ways of detailing joints to provide the desired serviceability.

3. Describe the purpose of joint filling and the importance and potential challenges of maintaining the joint filler.

4. List factors that need to be considered when extending the joint spacing to minimize the number of joints that need to be installed, filled, and maintained.


Any applicable errata are included with individual documents at the time of purchase. Errata are not included for collections or sets of documents such as the ACI Collection. For a listing of and access to all product errata, visit the Errata page.

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20 - 49 35%
50+ copies 50%