| slovo | definícia |
Portal bracing
(gcide) | Portal \Por"tal\, n. [OF. portal, F. portail, LL. portale, fr.
L. porta a gate. See Port a gate.]
1. A door or gate; hence, a way of entrance or exit,
especially one that is grand and imposing.
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Thick with sparkling orient gems
The portal shone. --Milton.
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From out the fiery portal of the east. --Shak.
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2. (Arch.)
(a) The lesser gate, where there are two of different
dimensions.
(b) Formerly, a small square corner in a room separated
from the rest of the apartment by wainscoting, forming
a short passage to another apartment.
(c) By analogy with the French portail, used by recent
writers for the whole architectural composition which
surrounds and includes the doorways and porches of a
church.
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3. (Bridge Building) The space, at one end, between opposite
trusses when these are terminated by inclined braces.
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4. A prayer book or breviary; a portass. [Obs.]
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Portal bracing (Bridge Building), a combination of struts
and ties which lie in the plane of the inclined braces at
a portal, serving to transfer wind pressure from the upper
parts of the trusses to an abutment or pier of the bridge.
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