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MASONS SUPPLY COMPANY
Oregon (800) 537-3407 ♦ Washington (800) 537-6216
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M A S C O . N E T
GENERAL & TECH INFO
DESIGN PRESSURE
The predetermined load per square foot at form
face predicated by pressure, temperature, rate
of concrete placement and height of concrete
above point considered.
DIAPHRAGM
Cross walls positioned between long span, deep
beams to provide lateral stability to the beams.
DOUGHNUT
A large washer of any shape to increase bearing
area of bolts and form ties, also to act as a shim.
DRAFT
The slight taper difference between opposite
sides of a form so that it will readily strip out
the concrete.
DUTCHMAN
Usually a solid lumber thickness utilized to fill
in under one side of (cribbing) equal height
wall forms such as on a side slope footing, also
to compensate for lineal dimension variation
between opposing forms due to a slight angle
corner or curved wall.
ELEVATION
A drawing showing a specific area projection of
a structure on a vertical plane.
EMBEDMENT
An insert, anchor bolt or other device attached
at the form face so as to be encapsulated by
the concrete for future attachments or structural
performance.
END-BARS
Perimeter frame members similar to end-rails but
are usually perpendicular to crossmembers.
END-RAILS
Perimeter frame members of prefab form panel
which are perpendicular to side-rails.
EXPANSION JOINT
A thickness of flexible material between
consecutive placements of concrete to absorb
linear expansion of concrete.
FACTOR OF SAFETY
Ratio of ultimate load to allowable load.
FALSEWORK
The temporary structure erected to support work
(Shoring)
in the process of construction, such as shoring
or vertical post to support an
elevated wall or spandrel beam.
FILLER
A non-standard width form panel used to take
up odd dimensions.
FILLER STRIP
Piece of wood, metal or other material placed
between large ganged slab form areas
and vertical surfaces to permit easy stripping
FILLET
A beveled or rounded inside corner.
FORM COATING
Anti-bonding material applied to form face
surface to induce easy stripping.
FORMWORK
The total system of support for freshly placed
concrete including the mold or sheathing which
contacts the concrete as well as all supporting
members, hardware, and necessary bracing.
FULL LIQUID HEAD
Concrete pressure where the entire pour is still in
a liquid state.
GANG FORM
A large area of wall form with independent
structural integrity. May also be a grouping
of panels to be used as a unit for convenience in
erecting, stripping and reusing.
GIRDER FORM
Self-supporting form system where the load is
carried in bending by the side panels.
GRADE STRIP
A temporary wood strip secured to form face
prior to concrete placement to denote finished
grade elevation.
GUYS
Cable anchor from ground to top of wall form to
(GUY WIRE)
brace in one direction through tension.
HAIRPIN
The wedge used to tighten some types of form
ties, also a hairpinshaped anchor set in place
while concrete is plastic.
HANDSET FORM
A modular form erected and stripped by hand
rather than a crane.
HAUNCH
A projection built on a wall or column used to
support a load outside the wall or column.
HE-BOLT
The outer unit of a three-piece wall tie, of which
the external threads of the outer units engage
the internal threads of an inner unit such as
a coil tie.
HEAD
The vertical height measurement of liquid
(LIQUID HEAT)
concrete in wall form.
HONEYCOMB
Undesirable voids left in the formed concrete
surface revealing unbonded coarse aggregates.
INITIAL SET
An early state of the concrete curing process at
transformation from a liquid to a solid.
INNER UNIT
The non-reusable center part of a three-piece
(INNER TIE)
she-bolt tie.
INSERT
A female threaded connector embedded in a
concrete to which a male anchor device
can be connected.
INVERT
The lowest visible surface; the floor of a drain,
sewer, tunnel, culvert, or channel.
JUMBO
Traveling support for forms, commonly used in
gang-formed tunnel work.
KERF
To make a series of cuts or notches in order to
curve a wood member.
KEYWAY
A recess or groove created in an earlier pour of
concrete which is filled with concrete of the next
pour giving shear strength to the joint.
KICKER
A piece of wood (block or board) or metal
attached to a formwork member to take
the thrust of another member.
KNEE BRACE
A brace between horizontal and vertical
members in a building frame or formwork to
make the structure more stable.
LEDGER
A horizontal structural member secured to a
concrete wall and used to support forms.
LIFT BEAM
See Spreader Beam.
LIFT BRACKET
Special brackets attached to top of ganged
forms to facilitate fast, safe attachment of crane
sling lines.
LIFTER
A lifting device used to vertically elevate
ganged forms to subsequent vertical reuses.
GLOSSARY OF TERMINOLOGY