Today we were with the architectural plan at the (future) construction supervisor, he saw no problem with the proposed dimensions.
That does not necessarily mean he would be a bad construction supervisor. But it would make me very suspicious.
According to the stone dimensions, construction would have stopped long ago,
Well, which came first - the chicken or the egg?
There actually is a generation of planners who couldn't care less about basic knowledge or fundamentals, and accordingly ignore the octameter grid with boundless arrogance.
cutting the stones is unproblematic and would hardly cost any time. At least not enough to warrant worrying about it.
That is as true as it is nonsense. The mason wants to achieve piecework output. He cannot afford to be held up by the ignorance of "graduates." What else should he do? – file a notice of obstruction, or instruct the planner, then be considered a troublemaker by his boss and get his papers? – no!
Of course, he will pragmatically recognize that the smarter one gives in, and a stone saw is something that does not need to be blessed first or could only be operated by a druid. So naturally, in the worst case, he cuts the stone.
But: the imaginary dimension of the ignorant planner does not always work out favorably, and then there is botching (I would not want to say "bungling," as the bungler behind the bungling pockets is actually not the mason but the planner). So where is the problem? – I would like to explain it again:
It lies in the correlation between joint rhythm and overlap dimension. This problem is relative in so far as the parameter "joint rhythm" can have different sizes. The overlap dimension is related to it and should professionally amount to "at least 40%." That means the (normally dry with plan bricks) butt joint should ideally be centered under/over the stone in the adjacent course, in percentages so 50/50, tolerant from 40/60 to 60/40. The tolerance is therefore 10% of the rhythm, and here the various sizes come into play: with aerated concrete (or with ETICS) we are talking about a 50 cm rhythm, and thus about a 5 cm tolerance range; with porous bricks, pumice, expanded clay or similar (monolithic) however a 25 cm rhythm, and thus only a 2.5 cm tolerance range. Let's take for example two wall pieces of ideal 200 cm, and the ignorant planner makes one 193 and the other 207 cm: then in the one case it is "eight rhythms minus 7 cm," normally tightly built and the last stone cut by 7 cm, okay, correctly recognized no end of the world; and in the other case "eight rhythms plus 7 cm." The same seven joints can either be "fairly" distributed; then it no longer fits tightly, but with some tolerance still dry. The mason will only do this if he is a precise virtuoso with a lot of experience and time for a steady hand. In reality it will be more frequent that this is compensated only in the last joint (but wait! – that alone would be too much). So there will be five normal, tight, dry joints – followed by two that share the seven centimeter gap and are puttied over (and – here I have no illusions as a Protestant: nobody looks anyway, and quickly with the mortar for the bed joints). Not even a romantic like me would seriously assume that our diligent mason would have tucked a leftover piece from before here under his arm ...