Masonry Magazine May 1971 Page. 27
Building Floor System
A new residential floor system that combines the permanence, fire safety, and acoustical properties of concrete with fast construction and easy integration of mechanical systems has been developed by the Portland Cement Association.
The system, identified as the I/D Floor, is designed for low-rise apartments and single-family homes. I/D is a trademark and service mark of PCA.
The I/D Floor system includes three basic components: cast-in-place concrete, steel purlins, and leave-in-place fiberboard forms. The forms rest on the steel purlins, which is the reinforcement for the concrete floor. Placing and finishing the concrete are simplified by the absence of protruding conduit and plumbing pipes.
Cavity space, developed from the shape of the forms, carries electrical conduit and plumbing pipes and serves as an area for heating and air-conditioning ducts and cold air returns.
The lightweight, easy-to-place fiberboard forms remain in place permanently. They are manufactured by Mansfield Tire & Rubber Co., Mansfield, Ohio. Forms and steel purlins are available from Keystone Steel and Wire Co., Peoria, III.
Concrete Pumping Seminar
Pumping is currently the most rapidly growing method of placing concrete. With this growth has come a host of problems, most of which are not new, but pumping and pumped concrete require new approaches for their solution.
The American Concrete Institute, in an effort to solve pumping and pumped concrete problems, will conduct a seminar, May 25-26, 1971, at the Sheraton-Biltmore Hotel in Atlanta, Georgia in cooperation with the ACI Atlanta Chapter.
Six technical papers by recognized authorities will be presented on Tuesday, May 25. These papers will deal with pump theory and design; capabilities and limitations of pumping concrete; criteria for pump placement of concrete; factors effecting concrete pumpability; quality control and specifications. The papers will also deal with lightweight as well as normal-weight concrete, pressurized concrete, and line pressures.
Fees for the seminar are $75.00 for ACI members and $100.00 for non-members of ACI. Registrations can be made by writing to ACI Education Department, P.O. Box 4754, Detroit, Michigan 48219.
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MODEL M-20 loading type concrete buggy. 12 cu.ft./2000. capacity for longer aus.
masonry
May, 1971
27