Tests are reported of hook and loop stirrup anchorages in thin toppings cast against precast members. Variables included were stirrup size, topping thickness, topping concrete strength, rough or smooth interface, and tensile strain normal to the anchorage. It is shown that #3, #4 and #5 bar stirrups can be anchored in 3.0, 3.5 and 4 in. (75, 90 and 105 mm) thick, normal weight concrete toppings, respectively, if the topping concrete has a strength of at least 3000 psi (20.7 MPa).
