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Assumptions First

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The assumption carrying your number

Send one number you already trust: a span, a capacity, a deflection limit, a gauge reading, a code value, a data series. I do not re-derive it. I show what has to be true for it to hold, in order, then name the single assumption it actually rests on, and the measurement or source that would expose it. Written read, one number or claim, in English. Structural engineering is my ground; other fields welcome if the assumptions are explicit. Not a design check, certification or stamp.

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