Imposed roof loads in combination with PV
Advisory Desk Note 541
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
We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products. We deliver an unparalleled combination of technical content and Artificial Intelligence (AI) technologies to surface answers from the vast universe of technical knowledge, both inside and outside the organization. In a single interface, we connect the dots between information scattered across many different sources, allowing technical professionals to make better, more informed decisions faster.