Title:
Waviness Index Compared with Other Floor Tolerancing Systems--Part II
Author(s):
Carl N. Ytterberg
Publication:
Concrete International
Volume:
16
Issue:
11
Appears on pages(s):
49-53
Keywords:
concrete construction; concrete slabs; F numbers; flatness; floors; measurement; surface; tolerances (mechanics); Construction
DOI:
Date:
11/1/1994
Abstract:
Automated data gathering devices supported by computer software provide flexibility in using a Canadian Standard Waviness Index and a corresponding proposed ASTM Waviness Index to evaluate floor flatness. The Waviness Index, WI 2-10, is compared with three existing flatness tolerancing methods: F F and F L numbers and deviation from a ten foot straightedge. Using detailed slope data from four sets of data, the four tolerancing methods are applied to evaluate flatness of the floors, and the accuracy and sensitivity of the methods are compared. A new defined wheel track floor flatness tolerancing method covered in ASTM E 1486 is described. Recommendations are given for adding the ASTM E 1486 random traffic Waviness Index and the Defined Wheel Track slope methods to current ACI 117 floor tolerance provision