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  2. Waffle slab - Wikipedia

    en.wikipedia.org/wiki/Waffle_slab

    Slab depth is typically 75 mm (3 in) to 130 mm (5 in) thick. [5] [3] As a rule of thumb, the depth should be 1 ⁄ 24 of the span. [5] The width of the ribs is typically 130 mm (5 in) to 150 mm (6 in), and ribs usually have steel rod reinforcements. [5] The distance between ribs is typically 915 mm (3 ft). [3] The height of the ribs and beams ...

  3. ISO 216 - Wikipedia

    en.wikipedia.org/wiki/ISO_216

    A0 has a surface area of 1 square metre (11 sq ft) up to a rounding error, with a width of 841 millimetres (33.1 in) and height of 1,189 millimetres (46.8 in), so an actual area of 0.999949 square metres (10.76336 sq ft); A4 is recommended as standard paper size for business, administrative and government correspondence; and A6 for postcards ...

  4. Waffle slab foundation - Wikipedia

    en.wikipedia.org/wiki/Waffle_slab_foundation

    Waffle slab foundations adhere to International Building Code requirements. By 2008, most states put into effect the changes adopted in the 2006 IBC and, in regards to foundations, the on-grade mat foundation has become a more attractive design because, as an engineered system, it already accommodates the 2008 design recommendations, and required no major modifications to bring it into compliance.

  5. Quality control system for paper, board and tissue machines

    en.wikipedia.org/wiki/Quality_control_system_for...

    The measurement value is averaged so that each sensor gives one measurement value per one data box which is typically from 5 mm to one centimeter of web width. For a 1 meter wide web, for instance, 100 - 200 measurement values are taken. These measurement values from a single scan (profile points) are called 'raw profiles'.

  6. Bristol board - Wikipedia

    en.wikipedia.org/wiki/Bristol_board

    Common sizes include 22 + 1 ⁄ 2 in × 28 + 1 ⁄ 2 in (572 mm × 724 mm) and its bulk thickness is 0.006 inches (0.15 mm) or higher [2] and A4, A3, A2 and A1. [ 3 ] [ 4 ] Bristol board may be rated by the number of plies it contains, basis weight , or, in Europe, by its grammage of 220 to 250 g/m 2 .

  7. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    It has the height of Canadian P4 paper (215 mm × 280 mm, about 8 + 1 ⁄ 2 in × 11 in) and the width of international A4 paper (210 mm × 297 mm or 8.27 in × 11.69 in), i.e. it uses the smaller value among the two for each side. The table shows how this format can be generalized into an entire format series.

  8. Voided biaxial slab - Wikipedia

    en.wikipedia.org/wiki/Voided_biaxial_slab

    Biaxial slabs commonly span up to 20 metres at a thickness of around 500 mm. [citation needed] The added strength also reduces the acoustic transmittance of the slab for low frequencies. The reduced mass of biaxial slabs also results in a more environmentally friendly product which produces less CO 2 emissions both in its construction and ...

  9. Surface plate - Wikipedia

    en.wikipedia.org/wiki/Surface_plate

    A 250 mm x 250 mm surface plate A surface plate is a solid, flat plate used as the main horizontal reference plane for precision inspection, marking out (layout), and tooling setup. [ 1 ] The surface plate is often used as the baseline for all measurements to a workpiece, therefore one primary surface is finished extremely flat with tolerances ...