Mueller Pre-Fab - Manual (Page 111)

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MeTal bUIlDInG TeRMs anD DefInITIons
Turn-of-the-nut Method: A method for pre-
tensioning high strength bolts . The nut is turned
from the “Snug tight” position, corresponding to a
few blows of an impact wrench or the full effort of a
man using an ordinary spud wrench, the amount of
rotation required being a function of the bolt diameter
and length .
Uplift: Wind load on a building that causes a load in
the upward direction .
valley Gutter: A channel used to carry off water
from the “V” of roofs of multi-gabled buildings .
vapor barrier: Material used to retard the flow
of vapor or moisture to prevent condensation from
forming on a surface .
ventilator: An accessory, usually used on the roof,
that allows the air to pass through .
Walk Door: See “Personnel Door”.
Wall covering: The exterior wall surface
consisting of panels .
Web: That portion of a structural member between
the flanges .
Web stiffener: See “Stiffener”.
Width: The dimension of the building measured
parallel to the main framing from sidewall to sidewall .
Wind bent: See “Portal Frame”.
Wind column: A vertical member designed to
withstand horizontal wind loads .
Wind load: The load caused by the wind from any
horizontal direction .
X-bracing: Bracing system with members
arranged diagonally in both directions to form an “X” .
See “Bracing” .
“Z” section: A member cold formed from steel
sheet in the shape of a “Z” .