In general, the Concrete Nails is a product that seems to go from saint to sinner in a very short time. They can be life-saving one minute and a disaster the next, but a little thought and care can reduce many of the problems and redress the balance to a... moreIn general, the Concrete Nails is a product that seems to go from saint to sinner in a very short time. They can be life-saving one minute and a disaster the next, but a little thought and care can reduce many of the problems and redress the balance to a more positive view.
As far as we know, self-tapping screw is used most often where access to forming a joint can only be obtained from one side. They work generally by cutting their own thread as they screw into the base material. Usually a small hole is drilled in the base material and a screw sized hole is drilled in the top material, when the screw is pushed through the top section and aligned with the small hole, the screw cuts its own thread when it is tightened with a screw driver. The system works very well when used properly, but will also cause problems when abused. So, in order to make the system work, the base material must be softer than the material from which the screw is made, otherwise it is not possible to cut the screw. On the other... less
