User guide

www.muellerinc.com
H-9
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”.