Imposed roof loads in combination with PV

Advisory Desk Note 541

Steel Construction Institute, 2025
Imposed roof loads in combination with PV Download document

Document Status

Current

Supplement

Civil & Structural Supplement

Series

Advisory Desk Note

Abstract

This SCI Advisory Note addresses design considerations for the fire resistance of composite slabs with profiled steel sheeting, focusing on achieving a fire rating of 30 minutes or more. It explains the required effective thickness of insulation material to prevent sheet buckling during fire exposure, referencing EN 1994-1-2. The note clarifies the conditions under which partial insulation may suffice and advises caution with configurations where reinforcement is limited to mesh alone. It highlights that reinforcement position, concrete cover, and detailing all influence slab performance in fire, encouraging designers to verify assumptions with test evidence or robust calculation methods.

History

April 2025 edition.

Subjects

  • Materials
  • Building structure
  • Steel building systems/frame
  • Metal sections/other items
  • Steel
  • Building systems/frame

Publisher History

With over 30 years experience, the Steel Construction Institute provide technical expertise and best practice to the steel construction sector.

Information

NBS

NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.

Accuris

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