Concrete slab in the context of "Expansion joint"

A lintel or lintol is a type of beam (a horizontal structural element) that spans openings such as portals, doors, windows and fireplaces. It can be a decorative architectural element, or a combined ornamented/structural item. In the case of windows, the bottom span is referred to as a sill, but, unlike a lintel, does not serve to bear a load to ensure the integrity of the wall.Modern-day lintels may be made using prestressed concrete and are also referred to as beams in beam-and-block slabs or as ribs in rib-and-block slabs. These prestressed concrete lintels and blocks can serve as components that are packed together and propped to form a suspended-floor concrete slab.

An arch functions as a curved lintel.

A cantilever is a structural element that is firmly attached to a fixed structure at one end and is unsupported at the other end. Sometimes it projects from a vertical surface such as a wall. A cantilever can be in the form of a beam, plate, truss, or slab.

When subjected to a structural load at its far, unsupported end, the cantilever carries the load to the support where it applies a shear stress and a bending moment.

A roll way or running pad is the pad placed on a concrete slab or on the ties on the outside of the 1,435 mm (4 ft 8+1⁄2 in) conventional track along both running rails of a rubber-tyred metro or along the unconventional track of a tram. The rubber-tyred wheels roll directly on the roll ways.

• With a conventional track:
  • The ones of the Montreal Metro are precast concrete on a concrete slab.
  • The ones of the Paris Métro are H-steel on ties.
  • The ones of the Mexico City Metro are H-steel.
  • The ones of the Santiago Metro are precast concrete below ground and H-steel above ground.
  • The ones of the Lausanne Métro Line M2 are H-steel.
  • The ones of the Lyon Metro (lines A, B and D) are H-steel.
• Without a conventional track:
  • The ones of the Lille Metro are precast concrete.
  • The ones of the Toulouse Metro are precast concrete.
  • The ones of the Sapporo Municipal Subway are flat steel with a central guide rail.
  • Busan Subway Line 4 runs directly on a concrete slab between guide bars.
  • Many people mover systems, such as Crystal Mover, run directly on concrete slabs or other surfaces between guide bars.
  • Some guided buses, rubber-tyred trams, such as Translohr and Bombardier Guided Light Transit, use concrete slabs while being guided by a single central rail.