Sentence 9.23.11.3.(4)

  1. OS2
  2. OP2
  3. OH1
  4. OH4
  5. OS1
  6. OS3

Objective

OS3 Safety in Use

Attribution

[F22-OS3.1]Applies to floors and elements that support floors.
[F22-OS3.7]Applies to walls, and elements that support walls, that contain doors or windows required for emergency egress.

Intent

Intent 1:

To supersede the requirement for top plates stated in Sentence (1) and permit lintels with splices to serve the function of the top plates.

These minimum dimensions for metal splices, and wood splices and their fasteners are to limit the probability of discontinuous support at the ends of lintels, which could lead to lintels being unable to resist expected lateral loads, which could lead to the excessive deflection or failure of walls.

Where walls support floors, this is to limit the probability of:

  • the excessive deformation of floors, which could lead to compromised operation of doors required for egress in an emergency, or
  • the excessive deflection or vibration of floors, which could lead to persons losing their balance, tripping or falling.

This is to limit the probability of harm to persons.

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