It would seem that there is nothing easier, than to hammer in a nail. This can make any boy, not to mention women. Why is it even the men but this seemingly simple operation sometimes does not go smoothly: the nail is hammered badly and suddenly bent; or the hammer blow falls not on the nail head, and a finger!
It turns out that this common and seemingly simple process has its rules and peculiarities, which cannot be ignored.
So, in the fresh, damp wood to hammer a nail is easier than in the dry, because the elasticity of this wood is lowered. And to compound has turned solid, the nail must be of sufficient length to enter the structure to which it is hammered, at least one-third.
To give greater strength to hammer together boards, nails are driven at an angle (1).
In dense wood nail included bad. So it is not bent, it is necessary to hold with a pliers (2).