Title:
Strap Steel for Prestressed Concrete Structures
Author(s):
K. P. Milbradt
Publication:
Journal Proceedings
Volume:
50
Issue:
1
Appears on pages(s):
357-363
Keywords:
no keywords
DOI:
10.14359/11768
Date:
1/1/1954
Abstract:
A new type of prestressing steel - strap steel - is introduced as offering possible economy for this type of construction. Tempered spring steel, 0.048 x 0.625 in., having an average ultimate strength of 215,000 psi and a yield strength of 182,000 psi were used. Economical prestressing clamps were developed. This type of prestressing was then applied to a test beam. Specific conclusions from the test were: (1) the strap was easily handled, placed, clamped, and stressed either singly or mutiply in one operation; (2) bond was sufficient to transfer the prestressing force; and (3) ultimate load deflection for the test beam was obtained with little elongation of the steel.