In building fire protection design,evacuation corridors must balance lighting and fire safety.Traditional fire-resistant windows often suffer from weak local protection due to differences in the fire resistance performance of the operable and fixed sections.Steel fire-resistant windows,however,with identical fire resistance standards for both operable and fixed sections,achieve dual protection of lighting and fire resistance through structural optimization and material upgrades,making them an ideal choice for evacuation routes in public buildings.
Equal Fire Resistance Standards:Breaking Traditional Design Limitations To reduce costs,traditional fire-resistant windows often use glass of different thicknesses or filling materials for the operable and fixed sections,resulting in inconsistent fire resistance limits.For example,in a renovation project of an office building,the original fire-resistant window’s operable section had a fire resistance time of only 20 minutes,while the fixed section reached 60 minutes.During a fire,the operable section failed first,allowing smoke to rapidly enter the evacuation route.The new type of steel fireproof window achieves the same fire resistance standard through the following technologies:
Unified material standards:Both the movable and fixed sashes use 12mm thick single-layer cesium potassium fireproof glass,achieving a fire resistance integrity of 60 minutes;
Structural equivalent design:Both the movable and fixed sash frames use 1.5mm thick cold-rolled steel plates,with the overlap gap width controlled within 1.5mm to prevent flame penetration;
Synchronous filling process:The interior of the door leaf is filled with intumescent fireproof and heat-insulating material(such as perlite),with a filling density deviation of≤5%between the movable and fixed sashes,ensuring synchronous thermal expansion.
Suitable for Natural Lighting:Balancing Transparency and Safety
Escape corridors require high levels of natural light,which steel fire-resistant windows meet through the following design features:
High Light Transmittance:Single-pane cesium potassium fire-resistant glass with a light transmittance≥85%,approaching that of ordinary float glass,reducing reliance on artificial lighting;
Large Opening Area:The hinged windows feature a top-hung opening design with an opening angle of up to 30°,accommodating over 30%of the ventilation area while avoiding outward opening that would encroach on space;
Invisible Frame:The steel frame undergoes fluorocarbon coating treatment,with a color consistent with the building’s exterior walls,visually minimizing the window frame’s presence and enhancing overall transparency.
Application Scenarios:From Public Buildings to Residential Projects
Commercial Complexes:Large-area steel fire-resistant windows are used in atrium evacuation corridors,meeting fire safety regulations while maintaining a sense of spaciousness;
Hospital Wards:Corridor fire-resistant windows require frequent opening for ventilation;fire-resistant design ensures effective fire containment from any location;
High-Rise Residential Buildings:Fire-resistant windows on refuge floors balance natural light and fire resistance;hinged windows can be regularly opened for cleaning,extending their service life.
Steel fireproof windows,through the technology of”fire resistance standards for both movable and fixed sashes”,solve the contradiction between lighting and fire protection in evacuation corridors with a low-cost and highly reliable solution,providing a better solution for building fire safety.