Horizontal Fire Resistance Test Furnace for Building Elements，ISO 834 horizontal fire resistance test furnace for building elements

The Horizontal Fire Resistance Test Furnace for Building Elements is designed for fire resistance testing of horizontal building components under controlled thermal exposure. Manufactured in accordance with GB/T 9978.1-2008. this furnace provides stable and uniform fire conditions to evaluate the fire resistance performance of load-bearing and non-load-bearing horizontal structural elements.

The system simulates standard fire curves and records temperature, pressure, and combustion behavior throughout the test, making it suitable for laboratories involved in building fire safety evaluation, material certification, and structural fire performance research.

Application

Building Fire Resistance Testing

Fire resistance evaluation of horizontal structural elements such as floors, slabs, roofs, and horizontal partitions.

Structural Engineering and Construction Materials

Testing of concrete slabs, steel floor systems, composite structures, and protected steel assemblies under standard fire exposure.

Fire Protection Materials

Performance testing of fireproof coatings and fire-resistant treatments applied to horizontal load-bearing components.

Fire Safety Research and Certification

Fire endurance testing to support compliance verification, safety assessment, and technical research.

Standards

The furnace complies with the following standards:

(1) GB/T 9978.1-2008 – Fire Resistance Tests — Elements of Building Construction — Part 1: General Requirements

(2) ISO 834-1 – Fire Resistance Tests — Elements of Building Construction — Part 1: General Requirements

(3) GB/T 9978.3-2008 – Fire Resistance Tests — Elements of Building Construction — Part 3: Commentary on Test Methods and Test Data Application

(4) GB/T 9978.5-2008 – Fire Resistance Tests — Elements of Building Construction — Part 5: Specific Requirements for Loadbearing Horizontal Separating Elements

(5) GB/T 14907-2018 – Test Standard for Fire Protective Coatings for Steel Structures

Parameters

Item	Specification
Number of Burners	12 proportional flat-flame burners (6 on each side, 5 m furnace length)
Operating Temperature	Maximum test temperature 1250 °C
Design Temperature	1350 °C
Combustion Mode	Low-speed proportional flat-flame diffusion combustion
Gas & Air Pressure	≤ 4000 Pa
Flame Length	≤ 500 mm
Furnace Temperature Measurement Points	9 points
Thermocouple Sleeve Extension	≥ 25 mm
Temperature Accuracy	< ±15 °C
Furnace Pressure Measurement	T-type probes, accuracy ±2 Pa, 3 points
Data Acquisition Rate	3 times per second
Fuel Gas	Liquefied petroleum gas
Equipment Dimensions	8 m (W) × 8 m (L) × 2.5 m (H)
Power Supply	AC 380 V, 70 kW
Equipment Weight	Approx. 5 t

Features

Robust Furnace Structure

Frame-type enclosure with refractory bricks and high-temperature insulation fiber ensures thermal stability while minimizing heat loss to the surrounding environment.

Safe and Accessible Operation Design

Steel platforms are installed around the furnace for convenient operator access and maintenance.

Advanced Combustion Safety Protection

Automatic flame-out detection with visual and audible alarms; the system cuts off LPG supply to the affected burner while other burners continue operating.

Reliable Gas Supply and Control System

Equipped with gas solenoid valves, proportional valves, pressure transmitters, ball valves, regulators, and filters to ensure stable and safe gas delivery.

Precise Air–Fuel Ratio Control

Combustion air is supplied by a dedicated blower with frequency inverter for airflow adjustment, ensuring optimal combustion conditions.

Independent Control System

Dedicated control components manage combustion processes and simulate standard fire curves accurately.

Automatic Temperature Curve Tracking

Real-time comparison between actual furnace temperature and the preset fire curve, with automatic correction via burner output adjustment.

Comprehensive Data Recording

All automatic control and test data are stored in the computer system for traceability and accuracy verification.

Accessories

(1) Proportional flat-flame burners

(2) Gas solenoid valves and proportional valves

(3) Combustion air blower with frequency inverter

(4) Gas pressure regulators and filters

(5) T-type furnace pressure probes

(6) High-temperature exhaust fan with inverter

(7) Programmable logic controller (PLC) system

(8) Computer-based control and data acquisition system

Test Procedures

Install the horizontal test specimen securely in the furnace opening according to the test configuration.

Set test parameters through the control system, including fire curve, test duration, and safety limits.

Start the combustion system and initiate the standard fire exposure.

Monitor furnace temperature, pressure, and combustion status in real time via the computer interface.

The control system automatically adjusts burner output to maintain the specified temperature curve.

Upon test completion, shut down the gas supply and allow the furnace to cool before specimen removal.

Maintenance Information

Inspect burners, gas valves, and pipelines regularly to ensure proper operation and safety.

Check temperature and pressure sensors periodically and verify measurement accuracy.

Clean refractory surfaces and exhaust ducts to prevent residue buildup.

Ensure the exhaust fan and combustion air blower operate smoothly.

Back up test data and control records to maintain traceability.

Conclusion

The Horizontal Fire Resistance Test Furnace for Building Elements provides a reliable and standardized solution for evaluating the fire resistance performance of horizontal building components. With precise temperature control, robust safety systems, and comprehensive data acquisition, the furnace supports fire safety testing, material evaluation, and compliance with national and international fire resistance standards.

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