I need to get some really strong holding power. Can I use a 1/4″ x 6″ Tapcon concrete screw t o attach 2″ x 4″ board to the concrete slab in my yard?
No. The maximum embedment for a concrete screw is 1-3/4″. When you add the maximum embedment to the 1-1/2″ of material that you want to attach to the concrete, you only have 3-1/4″. Once you drive the Tapcon® into the concrete past the maximum embedment, then the concrete screw may bind up or even break in the hole. All Tapcon® concrete screws can only be installed into the concrete up to the maximum embedment.
