Hollow Core Prestressed Concrete Plank Members, Des Moines, Iowa

Hollow Core Prestressed Concrete Plank Members, Des Moines, Iowa

Objective:

Use nondestructive ground penetrating radar to characterize and evaluate four (4) areas composed of prestressed concrete roof and floor planks. The targeted information was spacing, depth, quantity, diameter of pre-stressed tendons, and beam width of plank members. The purpose of this information is to determine load bearing calculations for new equipment installation.

Conclusions:

Individual floor and ceiling plank members consist of similar dimensions and structural design. Each plank surveyed has a 24” width, a 10” depth, and is prestressed with three 1/2” steel tendons. The number of strands in each ½” prestressed concrete tendon is not known. Each tendon is offset the hollow core spaced 8” – 10” apart.