MASCO Catalog: Concrete Forming & Accessories

254 MASONS SUPPLY COMPANY Oregon (800) 537-3407 ♦ Washington (800) 537-6216 Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Ridgefield | Seattle | Tacoma | Woodinville 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