Structural Steel

ADVANTAGES

  • 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  SPEC SELECT®

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 www.promat.co.uk/steel-fire-protection 

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.

Tests in accordance with BS 476: Part 21: 1987 have been performed on loaded beams and columns clad with Promat fire protection materials. Steel temperatures are monitored with thermocouples to assess the performance of the fire protection, since steel fully stressed in accordance with BS 449: Part 2: 1969 or BS 5950: Part 1: 2000 begins to lose its design margin of safety at temperatures around 550°C.

A range of unloaded sections has also been tested to obtain data for calculating exactly how much protection is needed for the most common steel sections and for providing fire resistance for different time periods.

These and other tests have also demonstrated the ability of the fire protection to remain in place, commonly termed as the ‘stickability’ of the material, for the maximum duration for which protection may be required. The availability of thin boards and the low weight of Promat boards plus the possibility of pre-fabrication ensure maximum cost-efficiency.


Technical Data Sheets

  • CAFCO®300 Primer Compatibility Guidance TDS134 Download Email
  • VERMICULUX®_Beams_with_Restricted_Access_to_Rear_Face_TDS096 Download Email
  • PROMATECT®-250_Beam_Encasement_with_Vetical_Movement_Allowance_TDS055 Download Email
  • PROMATECT®-250_Column_Encasement_to_Partition_Interface Download Email
  • PROMATECT®-250_Guidance_on_Treatment_of_Gaps_at_Joints_TDS102 Download Email
  • CAFCO®_Use_of_Mesh_Reinforcement_TDS137 Download Email
  • PROMATECT®-250_Beam_Head_Encasement_to_Partition_Interface_TDS093 Download Email
  • Interface_between_TD_Board®_Beams_and_VERMICULUX®_Columns_TDS088 Download Email
  • VERMICULUX®_Guidance_on_Treatment_of_Gaps_at_Joints_TDS009 Download Email
  • VERMICULUX®_Column_Encasement_to_Partition_Interface_TDS090 Download Email
  • TD Board_Cellular_Beams_and_Castellated_Sections_TDS156 Download Email
  • CAFCO®_Interface_to_Promat_Boards_TDS092 Download Email
  • VERMICULUX®_Profile_Followed_Beam_Cladding_TDS094 Download Email
  • VERMICULUX®_Wide_Flange_and_Multi_Beam_TDS095 Download Email
  • Interface_between_TD Board®_and_PROMATECT®-250_Steel_Columns_TDS060 Download Email
  • CAFCO® Structural Steel Polyurethane Topcoats Removal TDS129 Download Email
  • VERMICULUX®_Beam_and_Column_to_Partition_Interface_TDS047 Download Email
  • VERMICULUX®_Cast_Iron_Structural_Elements_TDS029 Download Email
  • 90_minutes_SUPALUX®_Protection_to_Wind_Posts_TDS103 Download Email

Fire Protection Handbook