//The square designs were eventually banned by FIFA in 1987, and the round version has also been gradually replaced by an elliptical shape created by the Standard Goals Company in Nottingham. Precision is absolute: crossbars today are curved slightly upward in order to counteract gravity, which naturally pulls the central section downwards. Douglas fir has also been superseded by aluminium as the material of choice.//
I was more interested in the reference to there being no crossbar, originally. Reminds me of all those playground arguments of whether or not a shot was too high to be a goal.