Structural assessment and load test of a RC roof top

Structural assessment and load test of a RC roof top

Structural assessment (including rebound hammer, Ferroscan) and load carrying capacity test on roof top of a 4-story hospital in Ubonratchathani province, Thailand, has been conducted. Where, a this building will be renovated in such a way that 4 more floors will be constructed on top of this RC roof slab to make a 8-story building. This hospital building was built 20 years ago, floor structural drawing and design load are doubtful. Thus, test is to make a new structural drawing of the floor and to determine load capacity of the floor compared with design live load following the building act.

In structural assessment part, RE engineer team collected floor's material properties eg. compressive strength of concrete, reinforcement layout and diameters. These parameters will be used in structural modeling analysis.

Load Test was conducted lastly to determine load carrying capacity of the slab, a test load of 1000 kg/sq.m. was applied over a span of 63 sq.m. Plastic water pond was made to retain water as load application. 3 sets of dial gauges and digital displacement transducers to measure floor's deflection were setup. Temperature effect on equipment, supporting truss was also taken into account by total station and prism.

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