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  2. Concrete slab - Wikipedia

    en.wikipedia.org/wiki/Concrete_slab

    For a suspended slab, there are a number of designs to improve the strength-to-weight ratio. In all cases the top surface remains flat, and the underside is modulated: A corrugated slab is designed when the concrete is poured into a corrugated steel tray, more commonly called decking. This steel tray improves strength of the slab, and prevents ...

  3. Expansion joint - Wikipedia

    en.wikipedia.org/wiki/Expansion_joint

    A joint replacing mortar with elastomeric sealant will absorb the compressive forces without damage. [4] Concrete decking (most typically in sidewalks) can suffer similar horizontal issues, which is usually relieved by adding a wooden spacer between the slabs. The wooden expansion joint compresses as the concrete expands.

  4. 50 Divisions - Wikipedia

    en.wikipedia.org/wiki/50_Divisions

    50 Divisions refers to the 50 divisions of construction information, as defined by the Construction Specifications Institute (CSI)'s MasterFormat beginning in 2004 ...

  5. Lift slab construction - Wikipedia

    en.wikipedia.org/wiki/Lift_slab_construction

    Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground level, negating the ...

  6. Joint (building) - Wikipedia

    en.wikipedia.org/wiki/Joint_(building)

    A building joint is a junction where building elements meet without applying a static load from one element to another. When one or more of these vertical or horizontal elements that meet are required by the local building code to have a fire-resistance rating, the resulting opening that makes up the joint must be firestopped in order to restore the required compartmentalisation.

  7. Rebar spacer - Wikipedia

    en.wikipedia.org/wiki/Rebar_spacer

    This includes ensuring the appropriate steel cover for specific structural elements (such as in a concrete slab or a beam) should be generally uniform within the element. [ 1 ] The use of spacers is particularly important in areas with high earthquake activity in combination with corrosive environments (like proximity to the salt water of the ...

  8. 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.

  9. Waffle slab - Wikipedia

    en.wikipedia.org/wiki/Waffle_slab

    In situ: Formwork construction and pouring of concrete occur on site, then the slab is assembled (if required). [4] Precast: The slabs are made somewhere else and then brought to the site and assembled. [4] Pre-fabricated: The reinforcements are integrated into the slab while being manufactured, without needing to reinforce the assembly on site ...