Column-to-Column Connection
Metal bearing plates and embedded anchor bolts are cast into column ends; connection is grouted for full bearing and protection from fire and corrosion. 【1-bdd8b2】
| Term | Definition |
|---|---|
Column-to-Column Connection | Metal bearing plates and embedded anchor bolts are cast into column ends; connection is grouted for full bearing and protection from fire and corrosion. 【1-bdd8b2】 |
Beam-to-Column Connection | Beams sit on bearing pads on column corbels; steel angles are welded to cast-in plates and joints are grouted solid. 【1-bdd8b2】 |
Slab-to-Beam Connection | Hollow-core slabs rest on bearing pads; reinforcing bars span the joint and the joint is grouted solid. 【1-bdd8b2】 |
Concrete Topping Over Precast Slabs | Provides greater strength, stiffness, fire resistance, acoustic isolation, easier service integration, and smoother floors. 【1-bdd8b2】 |
Seismic Design | Modern ductile joint design improves precast concrete performance in seismic areas. 【1-bdd8b2】 |
Seismic Design Detailing | Moving couplers away from slab/wall connections increases ductility. 【1-bdd8b2】 |
Precast Concrete Casting Beds | Long casting beds, typically 400 to 800 feet or more, used to manufacture precast elements. 【1-bdd8b2】 |
Pretensioning | High-strength steel strands are tensioned before concrete placement. 【1-bdd8b2】 |
Conventional Reinforcing | Includes reinforcing steel, weld plates, lifting loops, blockouts, and other embedded items. 【1-bdd8b2】 |
Hollow Core Slabs | Precast slabs with voids that reduce weight while maintaining strength. 【1-bdd8b2】 |
Transverse Bulkheads | Divide casting beds into sections before concrete placement. 【1-bdd8b2】 |
Mechanical Slab Lifting | Precast sections are lifted from casting beds and stockpiled for shipment. 【1-bdd8b2】 |
Insulated Sandwich Wall Panel | Two concrete wythes separated by rigid insulation; often prestressed to reduce cracking. 【1-bdd8b2】 |
Precast Element Shipping | Precast elements are transported by truck and erected with cranes. 【1-bdd8b2】 |
Loadbearing Framework | Precast concrete system using beams and columns to support loads. 【1-bdd8b2】 |
Double Tees | Precast floor/roof elements commonly used in parking structures. 【1-bdd8b2】 |
Loadbearing Wall Panels | Precast wall panels that carry structural loads. 【1-bdd8b2】 |
Bearing Pad | A pad used to distribute loads between precast elements. 【1-bdd8b2】 |
Composite Precast/Sitecast Construction | Combination of precast concrete with site-cast concrete, steel, or masonry systems. 【1-bdd8b2】 |
Plant-Cast Precast Concrete | Concrete manufactured in reusable steel forms under controlled conditions. 【1-bdd8b2】 |
Type III Cement | High early-strength cement allowing rapid precast production and curing. 【1-bdd8b2】 |
Precast Concrete Reinforcing | Uses pretensioned high-strength steel strands for structural efficiency. 【1-bdd8b2】 |
Precast Concrete Installation | Elements are lifted and assembled similarly to structural steel, enabling faster construction. 【1-bdd8b2】 |
Precast Concrete Slabs | Used for floors and roofs; deeper slabs span longer distances. 【1-bdd8b2】 |
Precast Concrete Beams and Girders | Support slabs and often include projecting bars for composite action. 【1-bdd8b2】 |
Columns and Wall Panels | Support slabs and beams; may be conventionally reinforced or prestressed. 【1-bdd8b2】 |
Solid Wall Panels | Precast wall panels that may be solid, hollow, or insulated. 【1-bdd8b2】 |
Ribbed Wall Panels | Wall panels with ribs to increase span capacity while minimizing weight. 【1-bdd8b2】 |
Two-Way Framing System | Concrete floor system reinforced to act structurally in two directions. 【1-bdd8b2】 |
Column Strip | Heavily reinforced slab region located along column lines. 【1-bdd8b2】 |
Middle Strip | Less heavily reinforced slab region between column strips. 【1-bdd8b2】 |
Two-Way Solid Slab | A slab supported by beams and reinforced in both directions; suitable for very heavy loads. 【1-bdd8b2】 |
Two-Way Flat Slab | A slab supported directly by columns using drop panels and/or column capitals. 【1-bdd8b2】 |
Drop Panel | Thickened slab region around a column that improves punching shear resistance. 【1-bdd8b2】 |
Mushroom Capital | Column enlargement that distributes loads and resists punching shear. 【1-bdd8b2】 |
Two-Way Flat Plate | A two-way slab supported only by columns without drop panels or capitals. 【1-bdd8b2】 |
Shear Studs | Studs used to strengthen slab-column connections in flat plate systems. 【1-bdd8b2】 |
Two-Way Waffle Slab | A two-way ribbed slab system with voids to reduce weight. 【1-bdd8b2】 |
One-Way Solid Slab | A slab spanning in one direction and supported by beams and girders. 【1-bdd8b2】 |
One-Way Concrete Joist (Rib Slab) | A slab supported by closely spaced ribs and beams. 【1-bdd8b2】 |
Wide-Module Concrete Joist | A joist system with ribs spaced 4 to 6 feet apart; also called a skip-joist. 【1-bdd8b2】 |
Column Footing | Foundation element that spreads concentrated column loads to soil. 【1-bdd8b2】 |
Dowel Bars | Vertical reinforcing bars that connect columns to footings. 【1-bdd8b2】 |
Column Reinforcing | Vertical bars and ties that increase load capacity and resist buckling. 【1-bdd8b2】 |
Ties | Reinforcing wrapped around column bars to prevent outward buckling. 【1-bdd8b2】 |
Mechanical Coupler | Device used to splice reinforcing bars end-to-end. 【1-bdd8b2】 |
Column Forms | Reusable molds used to shape concrete columns. 【1-bdd8b2】 |
Wall Footing | Strip footing that supports a concrete wall. 【1-bdd8b2】 |
Concrete Shear Wall | A reinforced wall designed to resist lateral forces. 【1-bdd8b2】 |
Form Ties | Slender rods or straps that resist fluid concrete pressure and hold formwork together. 【1-bdd8b2】 |
Snap Ties | Form ties whose projecting ends are snapped off after form removal. 【1-bdd8b2】 |
Fiberglass Ties | Form ties that can be ground flush with the concrete surface. 【1-bdd8b2】 |
Walers | Horizontal members that brace formwork panels. 【1-bdd8b2】 |
Modular Wall Form System | Reusable proprietary wall form system that can be raised as construction progresses. 【1-bdd8b2】 |
Self-Climbing Formwork | Formwork that uses hydraulic jacks to move upward as a structure is built. 【1-bdd8b2】 |
Contraction Joint | Vertical joint that controls cracking caused by concrete shrinkage. 【1-bdd8b2】 |
Insulating Concrete Forms | Permanent foam forms that improve wall energy efficiency. 【1-bdd8b2】 |
Tilt-Up Construction | Wall panels cast horizontally and lifted into final position after curing. 【1-bdd8b2】 |
Slab on Grade | A concrete slab continuously supported by the ground beneath it. 【1-bdd8b2】 |
Structural Concrete Slab | A slab that spans between supports rather than resting on soil. 【1-bdd8b2】 |
Subgrade Preparation | Process of clearing, excavating, grading, and compacting the site before concrete placement. 【1-bdd8b2】 |
Proof Rolling | Testing subgrade stability by repeatedly passing heavy equipment over it. 【1-bdd8b2】 |
Capillary Break (Drainage Layer) | Gravel or crushed stone layer that promotes drainage and limits moisture movement. 【1-bdd8b2】 |
Edge Forms | Wood or metal strips used to contain concrete at slab edges. 【1-bdd8b2】 |
Isolation Joint | Compressible joint allowing independent movement between slab and adjacent elements. 【1-bdd8b2】 |
Rigid Foam Insulation | Insulation installed below or around slabs to reduce heat loss. 【1-bdd8b2】 |
Vapor Retarder | Plastic sheet or barrier preventing moisture migration into interior slabs. 【1-bdd8b2】 |
Temperature Steel | Reinforcing used to limit cracking from shrinkage and temperature changes. 【1-bdd8b2】 |
Segregation | Separation of concrete components during placement that should be avoided. 【1-bdd8b2】 |
Screeding | Process of striking off fresh concrete to establish final surface elevation. 【1-bdd8b2】 |
Floating | Process that consolidates and smooths freshly placed concrete. 【1-bdd8b2】 |
Darby | A hand tool used to float small areas of concrete. 【1-bdd8b2】 |
Bull Float | A long-handled tool used to smooth large concrete slab surfaces. 【1-bdd8b2】 |
Edging and Grooving | Process of forming neat slab edges and joints. 【1-bdd8b2】 |
Troweling | Process used to create a smooth concrete finish. 【1-bdd8b2】 |
Broom Finish | A textured, slip-resistant concrete surface produced with a stiff broom. 【1-bdd8b2】 |
Shake-On Hardeners | Dry powders applied to increase slab surface hardness and durability. 【1-bdd8b2】 |
Laser Screeds | Laser-guided screeds that provide highly level and flat concrete surfaces. 【1-bdd8b2】 |
Curing | Process of keeping concrete moist to ensure proper strength development. 【1-bdd8b2】 |
Control Joint | A partial-depth groove that directs shrinkage cracking into a planned location. 【1-bdd8b2】 |
Expansion Joint | A full-depth joint allowing movement from thermal expansion, settlement, or loading. 【1-bdd8b2】 |
Posttensioning | Technique that places slab concrete into compression to reduce tensile cracking. 【1-bdd8b2】 |