Title:
Concrete Q&A: Measuring Flatness of Elevated Floors
Author(s):
Publication:
Concrete International
Volume:
46
Issue:
6
Appears on pages(s):
75-76
Keywords:
slab, straightedge, compliance, finishing
DOI:
10.14359/51740836
Date:
6/3/2024
Abstract:
This month's Q&A focuses on requirements for checking flatness of suspended slabs. It discusses the time limit for measuring floor flatness after finishing, compliance requirements for the manual straightedge method, minimum number of samples, and sample distribution, as well as possible remedies for noncompliance.
Related References:
1. ACI Committee 117, “Specification for Tolerances for Concrete Construction and Materials (ACI 117-10) and Commentary (ACI 117R-10) (Reapproved 2015),” American Concrete Institute, Farmington Hills, MI, 76 pp.
2. ASTM E1155-23, “Standard Test Method for Determining FF Floor Flatness and FL Floor Levelness Numbers,” ASTM International, West Conshohocken, PA, 2023, 8 pp.
3. ASTM E1486-14(2022), “Standard Test Method for Determining Floor Tolerances Using Waviness, Wheel Path and Levelness Criteria (Metric),” ASTM International, West Conshohocken, PA, 2014, 12 pp.