Structural Steel


  • Wind posts
  • Column encasement
  • Beam encasement
  • Cellular beams 
  • Castellated sections

More information available in the Fire Protection Handbook, Technical Data Sheets and SPEC SELECT®.

Structural Steel

Steel framed structures now account for some 70% of the multi-storey framed market, with stringent criteria for fire protection requirements.

Promat offers a full range of board and spray products providing flexible solutions to meet a variety of installation and fire protection needs.

  • 30-240 minutes fire resistance

More Information

i  FP Handbook: Chapter 3


i  Testing and Certification

i  Structural Steel White Paper

Modern buildings are becoming more complex resulting in continued challenges in building and ensuring occupier safety. Significant advances in the knowledge of steel behaviour in fire have been made in recent years, however issues around fire and steel frame fire protection remain critical to the future safety of the building fabric.

Promat’s recently published White Paper ‘Introduction to Making the Right Choice’ will assist architects and specifier professionals in making informed fire protection decisions. The paper covers:

  • Introduction to steel protection
  • The challenges facing the specification community
  • Fire protection options for steel structures
  • Key considerations for specification choice: cost, build programme, weather, curing time, repair and maintenance
  • Requirements for castellated/cellular beams
  • Conducting the correct thickness checks
  • Summary
  • Fire protection design guidance overview
The white paper is now available for free download from 

Also available through the Document Tab on this page or Document Library once Website Account Registration is complete)

Building Regulations (Document B) require certain elements of structures to have fire resistance for a specified minimum period of time. The amount of fire protection required to achieve this depends on the following:

  • Shape and size of the steel section
  • Perimeter of the steel section exposed to fire
  • Duration of fire resistance specified
  • Type of protection used
  • Limiting temperature of steel section
  • Test standard BS or EN requirement
A/V Section Factor: the degree of fire protection depends on the A/V section factor for the steel section. The A/V factor is a function of the area of the steel exposed to the fire and the volume of the steel section. The higher the A/V, the faster the steel section heats up, and so the greater the thickness of fire protection material required. The section factor and limiting temperature are then used to determine the thickness of protection required.

Chapter 3 of the Fire Protection Handbook provides tables to demonstrate performance of structural steel  at a series of temperatures. Further tables provide the required thickness of boards  for resultant A/V calculations and system designs. Additional system details are available in the Technical Data Sheets and SPEC SELECT®.

Wind Posts: a common way of providing lateral support to tall masonry walls in modern steel-framed buildings. In situations where the walls are also required to provide fire resistance between two compartments (or at a boundary position), the fire protection applied to the wind posts must also maintain the fire separation across the wall construction at that point.

Fire Protection Handbook

Product and Application Guides

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Technical Data Sheets

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