Floor design & const

Floor design & const

1. Functional requirements

   • Strength & stability
   • Limit deflection
   • Fire resistance
   • Sound & thermal insulation
   • Moisture resistance
   • Accommodation for services
   • Durability
   • Finishes
   • Appearance

2. Ground Bearing Slab (AD Part C)

3. Ground Floor Timber Suspended (AD Part C)

   • Ventilation to be 1500mm2/m run of wall or 500mm2/m2

4. DPC & DPM

   • Lapped 100 mm and taped
   • Provide impervious layer to prevent capillary action
   • 1200 gauge

5. Radon (NBS Shortcut 36)

   • Remedial work in suspended floor is to add ventilation to depressurise & DPC and DPM to have aluminium foil backing
   • Solid floor remedial works is to fit a radon sump
     • Radon Sump (BRE Good repair guide Radon solutions)
       • Underfloor space or cavity into which a pipe is inserted and used to extract Radon
       • Radon drawn to low pressure created by fan or the stack effect

6. Timber floors

   • Notching & Drilling - Trada WIS
   • Openings - Eurocode 5 Span tables

7. Beam & block

   • Type a config 520 mm C/C

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