Abstract: A plumb measuring device fabricated from a plurality of detachable modular assemblies includes a first assembly provided with an alignment bar, a scale plate pivotally mounted to the bar for determining the plumbness of a vertical surface, a bubble level attached to the scale plate to determine the level line of a vertical surface, indicia marked on the bar for reading the scale. A second scale plate is pivotally mounted just above the first scale plate for determining the degree of tolerance from plumb. A second modular assembly comprising interchangeable alignment bar extension members to be attached to either end of the bar for increasing the length of the measuring device. A third modular assembly comprising spacer means for detachable connection with the first or second assemblies to act as stand-offs to bridge distorted intermediate regions on a vertical surface. A compass is provided for attachment to the top of the first or second assembly for determining whether a driven pile has been rotated.

Abstract: Apparatus and process for determining and measuring the internal diameter of or the internal wear, pitting or thinning in a hollow pipeline, or the like, normally underground or underwater, whereby changes in the internal surface configuration or internal diameter of the pipeline at various points along its length are measured. The process includes measuring the changes in the internal configuration of the hollow pipeline, at various points along the length thereof and/or around the circumference thereof at various positions along the longitudinal axis thereof, and converting such measurements of changes in the internal configuration of the hollow pipeline into internal diameters or internal wear, pitting or thinning distance values.

Abstract: Apparatus for determining the load-carrying capability of a hollow pile driven into the ground to carry a vertical load. The apparatus measures changes in the internal radius (diameter) of the pile at various points along its length. The apparatus includes rotatable sensing means which enters the pile and senses the internal configuration of the pile in at least one predetermined radial direction for at least one predetermined level along the length of the pipe pile. The rotable sensing means also produces a signal representative of the internal configuration for each such predetermined radial direction at each such predetermined level along the length of the pile. The apparatus also includes means for rotating the rotatable sensing means to the desired radial position, and means for moving the rotatable sensing means longitudinally in the pile to the desired point along the pile's length.