Title:
Concrete Q & A: How F-Numbers are Measured; and Reinforcing a Circular Column
Author(s):
Publication:
Concrete International
Volume:
27
Issue:
3
Appears on pages(s):
101
Keywords:
DOI:
Date:
3/1/2005
Abstract:
How F-Numbers are Measured: Floor flatness and levelness for a project we’re building are to be measured in accordance with ASTM E 1155. How is the required testing performed, and is it always done with a DipStick®?
Reinforcing a Circular Column: I am an engineer and need to design and detail a circular column. The concrete contractor indicated that he would like to confine the vertical steel with circular ties rather than a spiral. My question is, according to ACI 318, Section 7.10.5.3, do I need to maintain a maximum 6 in. (150 mm) clear spacing between bars in the circular pattern?