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  2. Open web steel joist - Wikipedia

    en.wikipedia.org/wiki/Open_web_steel_joist

    The main function of an OWSJ is to provide direct support for roof or floor deck and to transfer the load imposed on the deck to the structural frame i.e. beam and column. In order to accurately design an OWSJ, engineers consider the joist span between bearing points, joist spacing, slope, live loads , dead loads , collateral loads, seismic ...

  3. Span (engineering) - Wikipedia

    en.wikipedia.org/wiki/Span_(engineering)

    In engineering, span is the distance between two adjacent structural supports (e.g., two piers) of a structural member (e.g., a beam). Span is measured in the horizontal direction either between the faces of the supports (clear span) or between the centers of the bearing surfaces (effective span): [1] A span can be closed by a solid beam or by ...

  4. Double tee - Wikipedia

    en.wikipedia.org/wiki/Double_tee

    Diagram of double tee beam. A double tee or double-T beam is a load-bearing structure that resembles two T-beams connected to each other side by side. The strong bond of the flange (horizontal section) and the two webs (vertical members, also known as stems) creates a structure that is capable of withstanding high loads while having a long span.

  5. Waffle slab - Wikipedia

    en.wikipedia.org/wiki/Waffle_slab

    The height of the ribs and beams should be 1 ⁄ 25 of the span between columns. [3] The width of the solid area around the column should be 1 ⁄ 8 of the span between columns. Its height should be the same as the ribs. [3] Diagram showing waffle slab rib and Beam Heights rule of thumb formulas.

  6. Girder bridge - Wikipedia

    en.wikipedia.org/wiki/Girder_bridge

    Longer spans, more traffic, or wider spacing of the beams will all directly result in a deeper beam. In truss and arch-style bridges, the girders are still the main support for the deck, but the load is transferred through the truss or arch to the foundation. These designs allow bridges to span larger distances without requiring the depth of ...

  7. Pier (bridge structure) - Wikipedia

    en.wikipedia.org/wiki/Pier_(bridge_structure)

    In this case, the height of the structure, measured between the top of the deck and the ground, is between the values a/3 and a/2, where a denotes the span of the arch, which is generally a semicircular or elliptical arch. [7] The thickness e of the pier depends solely on the span of the arches: a/10 < e < a/8.

  8. Timeline of three longest supported deck arch bridge spans

    en.wikipedia.org/wiki/Timeline_of_three_longest...

    The deck is supported by columns, truss, rubble or lies directly on the arch. These bridges are often found in narrow valleys. Because of the difficulty in telling an arch bridge apart from a bent beam bridge or certain cantilever bridges, all bridges that look like supported deck arch bridges are included in this timeline. The whole arch ...

  9. Portal frame - Wikipedia

    en.wikipedia.org/wiki/Portal_frame

    First developed in the 1960s, they have become the most common form of enclosure for spans of 20 to 60 meters. [2] Because of these very strong and rigid joints, some of the bending moment in the rafters is transferred to the columns. This means that the size of the rafters can be reduced or the span can be increased for the same size rafters.