Abstract: A reinforced concrete building structure comprises a shrinkage compensating concrete slab having a plurality of deformed reinforcing bars embedded therein, the bars being restricted to a peripheral portion of the slab which surrounds the centroid of the slab devoid of reinforcement and are aligned with the expansive and shrinkage forces to elastically restrain the forces and to thereby act as an internally developed tension ring.

Abstract: A vee joint having a first flange hingedly connected to a second flange at an angle. A trough is formed between the first flange and the second flange and is used to retain joint filler within a joint interval in a concrete floor slab. The flanges are movable to facilitate the placement and retention of the vee joint within various sized joints in concrete slab flooring. When the vee joint is placed within a joint interval, the flanges may be spaced varying distances apart to accommodate joint filler therebetween and to intimately engage with the confronting walls of the floor slab to avoid bypass of joint fill material.

Abstract: A roller compacted concrete industrial floor slab is formed by surface finishing the slab by using a separate thin topping bonded to a roughened surface of the RCC, or by manipulating the RCC surface itself by working into its surface a finish mixture of cement-coated, rice-sized grit in a moisture saturated condition to fill any voids in the surface.

Abstract: A method and apparatus is disclosed for measuring on-site expansive volumetric changes in hardened, shrinkage-compensated concrete samples. The sample is disposed in a cylindrical container having a strain gauge for measuring hoop stress which is correlated with expansion of the sample.

Abstract: This invention relates to apparatus and methods for measuring height variations on a floor surface to test for floor flatness sufficient for automated high level warehousing applications. An inclinometer mounted on a trolley set to follow a reference line produces signals indicative of the floor profile. A computer samples the sensor output at selected intervals and calculates floor height at the data points relative to a reference level. The floor profile data may be stored for subsequent use or it may be printed to form a plot or graph of the floor profile along the reference line.

Abstract: This invention relates to apparatus and methods for measuring height variations on a floor surface to test for floor flatness sufficient for automated high level warehousing applications. An inclinometer mounted on a trolley set to follow a reference line produces signals indicative of the floor profile. A computer samples the sensor output at selected intervals and calculates floor height at the data points relative to a reference level. The floor profile data may be stored for subsequent use or it may be printed to form a plot or graph of the floor profile along the reference line.

Abstract: An improved apparatus and method for measuring surface heights is disclosed which yields a true height profile of the surface being measured. The apparatus and method is adapted to provide a straight and preferably level reference datum adjacent to the measured surface from which height and slope variation along the measured surface are automatically sensed, recorded and plotted. Three structural embodiments of the apparatus of the present invention are disclosed which permit either separate or simultaneous transverse or longitudinal surface data to be obtained during operation.