A testing program was conducted at the University of Windsor in order to examine the effect of dynamic (repeated) loading on the strength of composite slabs. The slab specimens were made of 18 gauge (1.21 mm) T30 Hi-Bond Steel sheets with a 6 in. (15.24 cm) nominal depth concrete slab. The width was 18 in. (0.457 m), and span 8 ft (2.44 m). The design and failure of the slabs was governed by bond. Several pull-out specimens were also tested.The following conclusions were reached:(1) Specimens subjected to low values of dynamic load up to 60% of the static bond failure load) for 2 million cycles do not show any reduction in failure load due to bond when tested statically. Since a factor of safety is always applied the load would not exceed 60% of the bond failure load. Therefore no reduction factor should be applied to the bond stresses for slabs when subjected to dynamic load.(2) The lower limit for dynamic bond failure is about 87% of the static failure load.(3) The ultimate collapse load for all slabs tested varied only about 10%. This load is considerably greater than the bond failure load.(4) The allowable bond stresses should be determined from beam tests and not from pull-out specimens.