Profiles RHF LLC - UAE
NOMENCLATURE
BASIC TERMS
 
 
PORTAL FRAME:
Column and beam bracing used in lieu of standard rod or cable bracing, to provide clear access.
 
POST AND BEAM ENDWALL:
A system of endwall framing consisting of upright or vertical members (posts) with pinned ends
and supporting horizontal beams. These posts and beams are normally cold - formed members.
 
PRE-ENGINEER:
To design and detail components beforehand. Used also to man the fabrication and
design of standard sections.
 
PRE - FABRICATE:
To fabricate or build beforehand. To manufacture standard sections that can be rapidly assembled.
 
PRIMARY FRAMING:
The main load carrying members of a structural system, generally the columns and rafters
or other main support members.
 
PRIMER PAINT:
The initial coat of paint applied in the shop to the structural framing of a building for protection
against the elements during shipping and erection.
 
PURLIN:
A horizontal secondary structural member bolted to the rafters which transfers the roof loads
from the roof covering to the primary frames.
 
PURLIN EXTENSION:
A projecting secondary member used in connection with overhanging roofs.
 
PURLIN LINE:
The extreme outer, or exterior, edge of the purlins.
 
RAFTER:
Primary member supported on columns.
 
RAKE:
The intersection of the plane of the roof and the plane of the gable.
 
REACTIONS:
The resisting forces at the column bases of a frame, holding the frame in equilibrium under a
given loading condition.
 
REVISION:
A significant change in building design, building order, or product worthy of notation.
 
RIDGE:
Peak of a gabled building.
 
RIDGE FLASHING:
Continuous metal flashing used to close roofing material along the ridge of a roof.
 
RIDGE SIGN:
The finish trim at the highest point of the gable.
 
RIDGE CONNECTION:
A connection between two members which transfer the moment from one side of the
connection to the other side and maintains under application of load the same angle
between the connected members that exist prior to the loading. Also, a
connection that maintains continuity.
 
RIGID FRAME:
A structural frame consisting of members joined together with rigid (or moment) connections
so as to render the frame stable with respect to imposed loads,
without the need for bracing in its plane.
 
ROOF COVERING:
The exterior roof skin consisting of panels or sheets, and their attachments and weather sealants.
 
ROOF EXTENSION:
An extension of the roof beyond the endwall and/or sidewall of a building.
 
ROOF SLOPE:
The angle that a roof surface makes with the horizontal. Usually expressed in units
of vertical rise to 12 units of horizontal run.
 
SAG ROD:
Tie rods used to support flanges of girts or purlins.
 
SEALANT:
Any material which is used to close up cracks or joints to protect against leaks.
 
SECONDARY FRAMING:
Members which carry loads to the primary framing. In metal buildings this term
includes base angles, purlins girts, eave struts, flange braces, etc.
 
SELF DRILLING SCREWS:
Used for attaching panels and trims to girts and purlins. Pre-drilling is not necessary.
 
SELF TAPPING SCREWS:
Self TA tapping screw. Same function as S.D.S but needs pre-drilled holed.
 
SHEETING:
The exterior cover for a building, generally light gage metal, which has been cold
formed into a configuration having appearance, weatherproofing and structural qualities.
 
SHIMS:
Small steel plates used for leveling base plates or packing between structural members.
 
SHOP DETAILS:
Details prepared for and used by manufacturing in the fabrication of parts and assemblies.
 
SIDELAP:
A term used to describe the lap condition occurring at the side or lengthwise direction of panels.
 
SIDEWALL:
A term used to describe the entire composition of a building side.
 
SILL:
The bottom horizontal member of a door or windows opening.
 
SKYLIGHT:
Translucent fiberglass panel used in the roof to transmit natural light.
 
SLEEVE NUT:
A long, slender nut normally used to join two,' brace rods of the same diameter
together. (Also known as coupling)
 
SLIDE DOOR:
A single or double leaf door which opens horizontally by means of overhead trolleys.
 
SOFFIT:
The underside covering of any exterior portion of a metal building.
 
SPALL:
A chip or fragment of concrete which has chipped, weathered or otherwise
broken from the main mass of concrete.
 
SPAN:
Distance between the supports of beams, girders or trusses.
 
SPECIFICATIONS:
A statement of particulars of a given job, as to size of building, quality and performance
of men and materials to be used, and the terms of the contract. The most common
specification found in the metal building industry is the "Recommended Guide
Specifications For Metal Building Systems" published by the Metal Building
Manufacturers Association.
 
SPLICE:
A connection in a structural member.
 
S.S.D.:
Single Slide Door.
 
STEEL LINE:
The extreme outer limits of a buildings' structural framing system to which the sheeting is attached.
 
STEP IN EAVE HEIGHT:
The condition where a lower building is attached to a higher building at the endwalls,
resulting in one building with different eave heights at each end.
 
STIFFENER:
Plate welded to a member to prevent buckling.
 
STIFFENER LIP:
A short extension of material at an angle to the flange of cold formed structural members,
which adds strength to the member.
 
STITCH SCREW:
Used to fasten side laps of panels.
 
STRUCTURAL STEEL MEMBERS:
Load carrying members. May be hot rolled sections, cold formed shapes, or built- up shapes.
 
STRUTS:
A brace fitted into a frame work to resist force in the direction of its length.
 
SUCTION:
A partial vacuum resulting from wind loads on a building which cause a load in the outward direction.
 
TAPERED MEMBER:
A built-up plate member consisting of flanges welded to a variable depth web which
slopes from one end to the other.
 
TENSION:
Stress in a structural member created by forces tending to draw it apart longitudinally.
 
THRUST:
A horizontal component of a reaction.
 
TOLERANCE:
A fractional allowance for variations from the specified standard weight,
dimensions, etc., of mechanical construction.
 
TRACK:
A metal way for wheeled components; specifically one or more lines of ways,
with fastenings, ties, etc., for a craneway, monorail or- slide door.
 
TRANSLUCENT:
Allowing the passage of light, but not permitting a clear view of any object. A translucent
material is semi-transparent, or semi-clear.
 
TRANSVERSE EXPANSION JOINT:
A joint across- the width of a building to allow small relative movements, such as those caused
by thermal expansion and contraction of the materials used in the structure.
 
TRUSS:
Structural member made up of several individual parts welded or bolted together,
the completed unit acting as a beam.
 
TUBE COLUMN:
A vertical structure support member made of a hollow square tube. Normally used as an
interior support column in multi-span buildings or mezzanine floors.
 
TURN OF NUT METHOD:
A method of tightening high strength bolts in accordance with AISC "Specifications for
Structural Joints Using ASTM A-325 Bolts".
 
UH CRANE:
A multi- rail, underhung, material handling system, manually or electrically operated.