Limitations (concrete beam: ACI 318)

Tekla Structural Designer
2021
Tekla Structural Designer

Limitations (concrete beam: ACI 318)

The following general exclusions apply.

The current release will not:

  • redistribute moments
  • design beams with reinforcement made up of bundled bars
  • design beams for axial load
  • design beams for minor axis bending and shear
  • design beams as “deep beams” - beams classified as “deep” are designed as if they are regular beams and a warning is displayed.
    Note:

    Deep beams according to ACI 318 are:

    (a) Members with clear spans equal to or less than 4 times overall member depth

    (b) Members with concentrated loads within twice the member depth from the support

  • design beams in lightweight concrete
  • design beams with coated reinforcement
  • design beams with stainless steel
  • design prestressed concrete
  • design structures subject to very aggressive exposure
  • design watertight structures

material limitations for concrete:

  • for structural concrete compressive strength of concrete fc' shall not be less than 17 MPa (2500psi)
  • durability requirements are not implemented

material limitations for reinforcement:

  • the values of specified yield strength of reinforcement; fy and fyt used in calculations shall not exceed 550 MPa (80000psi)
  • specified yield strength of non-prestressed reinforcement; fy and fyt shall not exceed 420 MPa (60 000 psi) in design of shear or torsion reinforcement
  • wire reinforcement design is not implemented
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