Deflection
The limit the mullions are held to.
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The limit
- AAMA (the default)
- L/175 up to a 13'-6" span, L/240 + 1/4" above, 1-1/4" at most.
- L/175 or 3/4"
- Whichever is smaller.
- L/240 + 1/4", 3/4" max
- A common spec limit.
- From the spec...
- Type the spec's own: L / ratio, plus (in), max (in).
- Deflection source
- The spec section, such as 08 44 13.
A spec limit never allows more than AAMA: the smaller one governs.