We can have the best tubular steel scaffolding or any other work platform in existence today, and it would be no safer than the weakest scaffold plank on the work deck. Therefore,if we are to have safety on the job, we must excesses care in the selection and use of the scaffolding planking.
     Lets see what constitutes Good scaffolding plank and how it should be used. The plank should be no less then 2x10 inches (nominal size). It should be rough-dressed, seasoned,strained grained, free from large, loose or dead knots, and obviously free from groups of knots. Check for splits and any other defect tending to decrease the structural strength.
     Another very important step is always field test the plank before live-load use. A good and practical method is to lay the plank across two concrete blocks or any other blocking material. Make sure the span is equal to or greater than the span of the scaffold when in use. Two workers should stand in the middle of the plank ( it is not necessary to jump up and down). A plank that cracks,splits or otherwise does not perform in an acceptable manner must be discarded.
     After field testing has been completed, the plank is then placed on the scaffold. This brings up another important phase: securing the plank to the scaffold to prevent movement and slipping. Where there is a fixed distance to span, such as in tubular steel scaffolding, a good way to prevent slippage is to install cleats. If this isn't practical or becomes necessary to overlay planks, the securing should be down by wiring after the plank has been properly placed.
   Last and equally important is to take care of the piece of lumber as if your life depends on it, because in most cases it does.