A weight on two beams meeting head to head
The rule relating the loads at the beam's ends to the intercepted perpendicular spaces
A triangular sketch at the top shows a weight hung by a plumb line from the apex where two inclined beams rest head to head on a horizontal base. The accompanying text, in mirror script, states the statics rule: the loads carried at the opposite ends of the beam stand in the same proportion as the spaces enclosed between the perpendicular through the weight and the perpendiculars dropped from the beam's ends.
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Proportion of loads on two beams meeting head to head
A weight is suspended from the meeting point of two inclined beams that lean head to head. Leonardo asserts that the weights borne at the opposite ends are in the same ratio as the spaces enclosed between the perpendicular through the hanging weight and the perpendiculars through the beam's ends.