Tiêu chuẩn iso 12468 1 2013

Reference numberISO 12468-1:2013ECopyright International Organization for Standardization Provided by IHS under license with ISO Licensee=University of Alberta/5966844001, User=sharabia

General requirements

For each level of fire exposure, two specimens shall be tested with dimensions measuring

Each test pitch measures approximately 200 mm ± 10 mm in width and 2,000 mm ± 10 mm in length (see Figures 1 and 2) If the specified dimensions cannot be met due to the size of the roof light or other obstructions, a larger specimen should be used to ensure accurate testing.

Roof lights present challenges related to their size, shape, material composition, and fire behavior, which require careful consideration Additional guidance on testing methods for roof lights will be provided in the upcoming revision of ISO 12468 to ensure safety and compliance.

Copyright International Organization for Standardization

Provided by IHS under license with ISO Licensee=University of Alberta/5966844001, User=sharabiani, shahramfs

The specimens shall be representative in all details of the roof in practice.

Dimensions in millimetres with tolerances of ±10 mm

Figure 1 — Measuring zone and position of brands for Level A

Figure 2 — Measuring zone and position of the brands for Level B or Level C

Selection of standard supporting elements

The test deck must be selected according to specific guidelines, including the use of a roof deck as specified in sections 6.2.1.2 or 6.2.1.4 for roof coverings installed over continuous decks For roofs installed over non-profiled metal decks, an appropriate roof deck conforming to these standards is required, ensuring compliance with ISO 2013 specifications.

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Wood particleboard is composed of wood particles bonded with a polymer adhesive such as urea formaldehyde It has a specified density of 680 kg/m³ ± 50 kg/m³ to ensure consistent quality Importantly, this type of particleboard should not be treated with fire retardants, maintaining its standard composition and properties.

A wood particleboard deck must be constructed from planks measuring 250 mm wide and 13 mm ± 1 mm thick, installed parallel to the eaves These planks should have plain edges and be tightly butted together, ensuring that the gaps between the planks do not exceed 0.5 mm for a secure and uniform surface.

6.2.1.2.3 If it is intended also to cover the case of decks made from wooden planks with plain edges, then these gaps shall be 5 mm ± 0,5 mm.

The trapezoidal profiled metal deck is constructed from either aluminum or steel, depending on the intended application It features a crown width approximately equal to 50% of the profile pitch and a trough depth of around 100 mm The corrugations run parallel to the eaves, ensuring optimal structural performance, and are open at the ends for enhanced versatility and installation flexibility.

For roofing materials designed for installation on continuous, non-combustible decks at least 10 mm thick, the test roof deck must consist of a reinforced calcium silicate board with a thickness of 12 mm ± 2 mm This board should have an oven dry density of approximately 900 kg/m³ ± 100 kg/m³ to ensure proper performance and compliance with fire safety standards.

The spacing of roof supports must adhere to the maximum permissible spans recommended by the manufacturer for each specific application These support spacings should not exceed the minimum dimensions outlined in section 6.1 for the specimen Ensuring proper support spacing is essential for structural safety and compliance with manufacturer specifications.

Positioning of joints

Joints should accurately reflect real-world application scenarios When layers overlap, the joint position should align with the edge of the upper layer to ensure proper construction and durability.

6.3.2 Description of specimen types with respect to joints

For accurate field representation, specimens must be fabricated with layer dimensions that do not require more than four pieces to cover the specimen, especially if any layer is without joints This ensures the layers are representative of real-world practice, adhering to standard construction methods Refer to Figures 3 and 4 for visual guidance on proper specimen fabrication and layering Following these guidelines ensures compliance with best practices for layered material installation and testing.

Specimens are categorized by the following types:

Type 1 consists of a single central vertical joint in the top layer, complemented by a single horizontal joint below the left brand’s position Additionally, it features a single vertical joint in the layer beneath the top layer, aligned with the right brand, and a vertical joint in the insulation layer under the left brand’s position This configuration, illustrated in Figure 4a, is essential for understanding specific joint placements in layered construction.

Type 2 construction features a single vertical joint in the top layer positioned beneath the right brand, ensuring precise alignment Additionally, it includes a single vertical joint in the layer adjacent to the insulation beneath the left brand, as illustrated in Figure 4b This design offers improved structural integrity and optimized insulation performance.

Type 3 involves a single cross joint located in the top layer beneath the right brand position Additionally, where the product design permits, a vertical joint is implemented in the layer beneath the top layer under the left brand, as illustrated in Figure 4 c), Type 3 This joint configuration enhances structural stability and aligns with optimal manufacturing practices.

Type 4 features a design where the element's center aligns with one top layer element, with the supporting deck joint positioned vertically beneath the right brand, depending on the product design When applicable, the joint is located under the left brand in insulation, optimizing structural integrity and aesthetic coherence Refer to Figure 4 d) for a visual representation of Type 4 configuration.

6.3.3 Selection of the specimen types

Either specimen types, Types 1 and 2 or Types 3 and 4, shall be used for each test pitch and for each level of fire exposure.

Edge detailing

No special measures shall be taken by the sponsor to protect the edges of the specimen.

1 vertical joint in top layer 6 vertical joint in supporting deck

2 horizontal joint in top layer 7 weathering layer

3 joint in layer next to insulation 8 insulation

4 joint in layer next to top layer 9 roof deck

Figure 3 — Identification of joints in a multilayer roof

Exposure levels

The article defines three distinct levels of thermal protection Level A includes Brand A combined with wind and supplementary radiant heat, providing the highest level of insulation Level B incorporates Brand B with wind exposure but without additional radiant heat, offering moderate protection Level C involves Brand C with wind exposure only, without extra radiant heat, representing the basic level of thermal defense These classifications help determine appropriate clothing or equipment based on environmental conditions (ISO 2013)

The wind conditions are consistent across Levels A, B, and C, with the measuring zone, brand placements, and radiant panel positions clearly illustrated in Figures 1 and 2 The study compares four types: Type 1, Type 2, Type 3, and Type 4, each representing different configurations for accurate assessment of environmental impacts This detailed analysis provides valuable insights into how various setup arrangements influence performance, facilitating better design and optimization in related applications. -**Sponsor**Need help making your article SEO-friendly and coherent? With [Article Generation](https://pollinations.ai/redirect-nexad/8WEpm0Na), you can effortlessly create high-quality, SEO-optimized articles in minutes If you're struggling to rewrite paragraphs while keeping their meaning and optimizing for search engines, Article Generation can help you save time and money It's perfect for content creators looking to boost their online presence!

1 vertical joint in top layer 4 joint in layer next to top layer

2 horizontal joint in top layer 5 joint in insulation

3 joint in layer next to insulation 6 vertical joint in supporting deck

Figure 4 — Position of joints and types of specimens

Brands

Two brands are utilized for each specimen The test brands shall be constructed from Beech (Fagus salvatica or Fagus grandifolia) having an oven-dry density of 560 kg/m 3 ± 50 kg/m 3

The final mass of the finished brand after conditioning in an oven at 40 °C to 50 °C for at least 24 hours is specified as 33 g ± 5 g for Brand C, 155 g ± 10 g (excluding fasteners) for Brand B, and 550 g ± 50 g (excluding fasteners) for Brand A.

Brand A shall consist of a grid of approximately 150 mm square and 57 mm deep, using nominally

In the construction, 19 mm × 19 mm × 150 mm lumber strips are arranged in three layers, each consisting of six strips placed at right angles to the adjacent layers for enhanced stability These strips are evenly spaced within the designated brand envelope, ensuring consistent spacing throughout The strips are securely fastened to this configuration using light nails or staples, as illustrated in Figure 5, to maintain structural integrity and precise alignment.

Brand B shall consist of a grid of approximately 80 mm square and 57 mm deep, using nominally

The construction uses 19 mm × 19 mm × 80 mm lumber strips arranged in three layers, each with three strips positioned at right angles to the adjacent layers for structural stability These strips are evenly spaced within the designated area to ensure uniformity They are fastened securely using light nails or staples, as illustrated in Figure 6, following ISO 2013 standards for quality and safety.

Brand C is characterized by a 40 mm × 40 mm × 40 mm piece of lumber featuring a 3 mm wide saw cut, positioned at the center of the top and bottom faces, with the cut spanning half the thickness of the board The saw cuts on opposite faces are oriented at right angles to each other, ensuring precise cross-sectional design This specific configuration of Brand C enhances its structural integrity and precision, making it ideal for woodworking and construction applications where accurate cuts and measurements are essential.

Wind

A wind-generating apparatus designed to direct air over the calibration element's surface at a controlled temperature of 20 °C ± 15 °C, with airflow velocity specified in section 8.2.3, must be used The device should include a control system to regulate the volume rate of airflow Additionally, the wind outlet section of the apparatus's tube must have a minimum dimension to ensure proper airflow distribution and accurate calibration results.

The duct should measure at least 250 mm in height and 1,000 mm in width, with a minimum length of 1,200 mm to ensure optimal airflow Incorporating baffles and flow smoothers is essential to prevent turbulence and promote a smooth flow pattern, enhancing the overall efficiency of the ventilation system.

A vane anemometer with a maximum diameter of 25 mm must be used to accurately measure air velocity The device should record the average air velocity over a period of 10 to 30 seconds at each designated position, ensuring reliable data collection Measurement should be performed with the airflow parallel to the surface and aligned with the longitudinal axis of the calibration element for consistency and accuracy.

So as to minimize the disturbance of the flow pattern in the region of the measuring zone, a supporting device shall be used.

A simulated eave shall be installed in front of the test specimen to prevent air from flowing underneath the test specimen.

This shall be done in a way so as not to interfere with or obstruct material flowing or falling from the roof surface (see Figures 9 and 10).

Radiation

A 600 mm ± 10 mm x 600 mm ± 10 mm radiant panel will be provided, designed for mounting parallel to the specimen surface at a precise distance of 500 mm ± 10 mm This setup ensures accurate and consistent testing conditions, with the radiant panel capable of delivering uniform thermal radiation Proper placement and calibration of the panel are essential for reliable results, making it a critical component in thermal testing protocols.

The radiant panel must reliably deliver a heat flux distribution on the specimen's surface, as specified in section 8.2.4, even when wind is present To ensure accurate measurement, a flux meter with an accuracy of at least 5% of the target value should be used to determine the total heat flux.

Timing device

A timing device with an accuracy better than or equal to 5 s over 1 h shall be provided for the recording of the sequence of events during each test.

Calibration element

The calibration element consists of a smooth, flat 12 mm ± 2 mm thick sheet of calcium silicate material having the dimension 1 200 mm × 2 000 mm and a density of 900 kg/m 3 ± 100 kg/m 3

A 25-mm-diameter Schmit Boelter heat flux meter, with a measurement range of 0 to 50 kW/m², is essential for accurately determining heat flux distribution on the calibration surface The target receiving radiation from the radiant panels must be flat, circular, and coated with a durable matte black finish to ensure optimal absorption It shall be water-cooled to maintain consistent temperature conditions, and no windows should be placed between the source and the target to avoid radiation interference The instrument should be robust, user-friendly, and stable in calibration, offering an accuracy of ±3% and a repeatability of 0.5% for reliable measurements.

To ensure accurate heat flux measurements, calibrate the heat flux meter by comparing it with two reference standards of the same type and similar range, which are exclusively used for calibration purposes One of these reference standards must undergo full calibration at a certified laboratory annually Regular calibration with reliable reference instruments is essential for maintaining measurement accuracy and compliance with quality standards.

Specimen holder

3 a anemometer location (plan view) a All dimensions specifying the positions of the anemometer are in millimetres with tolerances of ±5 mm See

Figure 8 — Positions for air velocity measurement

Figure 10 — Examples for general test arrangement for Level B and Level C

Dimensions in millimetres with tolerances of ± 5 mm

X positions for heat flux measurement a Air flow.

Figure 11 — Positions for heat flux measurements during calibration

Gas burner

Ensure the gas burner is of appropriate size so that the ignition flames are fully enclosed within the burner during operation The burner must be shielded from draughts to maintain stable combustion Additionally, the flame temperature of the igniting flame should be monitored to ensure safe and efficient operation.

Figure 12 — Example of suitable stand and burner

5 stacked thermocouple 3 mm off centre

6 inner ring a General tolerances ±5 mm. b Thermocouple is directly over the inner ring, just 3 mm off centre The thermocouple is 63 mm ± 2 mm above the inner ring.

Figure 13 — Example of suitable installation of stand and burner with thermocouple

Stand

A sturdy stand should be provided to support the brand during ignition, positioned approximately 60 mm ± 5 mm above the top of the burner to ensure safety and stability An example of an appropriate stand design is illustrated in Figures 12 and 13, highlighting the importance of proper placement for safe ignition procedures.

Test environment

Tests must be conducted in a draught-free enclosure with a minimum volume of 150 m³, ensuring a controlled environment for accurate results The specimen's lower edge should be positioned approximately 750 mm above the floor, with a permissible variation of ±250 mm, and the floor can be a non-combustible horizontal platform set at the correct height Prior to conducting the fire test, the enclosure temperature must be maintained at 20 °C ± 15 °C to ensure consistency Additionally, any measures implemented to extract combustion products from the test laboratory should be operational during the calibration period and maintained throughout the testing to ensure safety and test integrity.

Calibration procedure

The interval between calibration and test shall not exceed seven days A new calibration shall be done each time the pitch is changed.

With the non-combustible calibration element placed on it, the test specimen holder shall be elevated to its required pitch with respect to the horizontal.

Before igniting the radiant panel, a uniform airflow shall be established using the equipment described in 7.3.1.

The anemometer shall be positioned at seven locations.

Four locations shall be 500 mm ± 5 mm from the bottom edge with three locations (v 1 , v 2 , and v 3 )

100 mm ± 5 mm above the calibration element with v 2 on the central axis and v 1 and v 3 located

300 mm ± 5 mm on either side of the central axis and one location (v 4 ) on the central axis 200 mm ± 5 mm above the calibration element See Figure 8.

Three measurement points—V5, V6, and V7—should be positioned 1,700 mm ± 5 mm from the bottom edge and 100 mm ± 5 mm above the calibration element to ensure precise alignment V6 must be located on the central axis, while V5 and V7 are positioned 300 mm ± 5 mm on either side of the central axis, providing accurate reference points for calibration Refer to Figure 8 for a visual guide on the placement of these locations.

The target velocities are as follows:

The temperature and relative humidity of the air used in generating the wind shall be measured and recorded to the nearest degree Celsius and percent relative humidity respectively.

To ensure accurate calibration, position the calibration element and set the wind speed correctly before adjusting the radiant panel The panel should be calibrated so that the flux at the central point measures (12.5 ± 0.5) kW/m², while the flux at the four locations along the major axes, as illustrated in Figure 11, remains at a minimum of (10 ± 0.5) kW/m² Proper calibration ensures precise and consistent measurement results.

Conditioning

During testing, the specimen's moisture content should reflect the typical condition expected during normal service If the specimen absorbs moisture or contains moisture, it must be dried to an air-dry condition before testing The air-dry state is defined as the equilibrium moisture content achieved by drying in an ambient atmosphere with 50% relative humidity at 23°C, ensuring accurate and consistent test results.

To achieve accurate moisture equilibrium, store the specimen in an enclosure maintained at a minimum of 15 °C and no more than 75% relative humidity Moisture equilibrium is reached when two consecutive weighing measurements taken 24 hours apart show no more than 0.1% difference in the specimen's mass This method ensures reliable results for moisture content analysis by maintaining controlled environmental conditions and confirming stable weight measurements.

Accelerated conditioning is permissible provided the method does not alter the properties of component materials In general, high temperature conditioning should be below the temperature critical for the materials.

If the required moisture content cannot be achieved after conditioning, but the design strength of the absorptive component has been reached, the specimen may then proceed to the fire test Ensuring proper conditioning and verifying the design strength are essential steps before conducting the fire test to validate the specimen's performance.

Representative samples are used for moisture content determination and must be properly conditioned These specimens should be constructed to accurately represent water vapor loss, with consistent thickness and exposed faces to ensure reliable results.

Standards for specific elements may contain additional or alternative rules for obtaining moisture equilibrium.

Protection of the edges

To prevent test failure caused by flames passing around the edges of the specimen, laboratories should implement specific measures that do not alter the fire behavior within the measuring zone or the specimen itself These protective measures must be clearly detailed in the test report If protecting the lower edge is necessary, it should be done in a manner that does not interfere with material flow or fall from the roof surface, ensuring accurate and unobstructed fire testing results.

General

For testing non-flat surfaces such as corrugated products or tiles, the uppermost part of the specimen should be used as the reference plane This ensures accurate positioning of the specimen concerning the radiant panel and wind machine Proper referencing is essential for consistent and reliable testing results on uneven surfaces.

Commencement of the test

The wind velocity and radiant heat flux shall be controlled using the same settings as for the most recent calibration The laboratory conditions shall be as specified in 8.1.

The test procedure involves verifying the operation of the wind machine and igniting the radiant panel to reach stabilization Next, the specimen is positioned at the specified slope on the holder, and both brands are ignited simultaneously After 3.5 minutes from ignition, the specimen is properly aligned with the radiant panel and wind machine, and the brands are placed onto it immediately after ignition The timing begins as soon as the brands are placed on the specimen, marking the official start of the test.

10.2.2 Test at Level B or Level C

To conduct the test, first ensure the wind machine is operational Next, position the specimen at the specified slope on the holder and ignite both brands as outlined in section 10.3.3.1 Immediately place the ignited brands onto the specimen, then start the timing device simultaneously with the placement, marking the beginning of the test.

Ignition and positioning of the brands

The brands shall be ignited and positioned in accordance with the procedures given in 10.3.2 to 10.3.3. The general tolerance for the position of the brands is ±10 mm.

Expose each Brand A to the flame for 240 seconds ± 10 seconds, ensuring they are rotated to expose all surfaces evenly Specifically, hold each 150 mm × 150 mm face to the flame for 30 seconds, then each 57 mm × 150 mm face for 30 seconds, and finally, again expose each 150 mm × 150 mm face for 30 seconds This process guarantees comprehensive testing of the material's flame resistance.

Position the brands 500 mm from the lower edge of the specimen, with each positioned 370 mm apart and equidistant from the specimen’s longitudinal centreline Orient one brand with top strips parallel and the other with top strips perpendicular to the bottom edge of the test specimen to ensure accurate testing conditions Secure the brands using wires anchored to the specimen edges to maintain precise placement If the roof surface is uneven, position the brands at least 200 mm on either side of the centreline, 500 mm from the lower edge, with exact locations determined by the test laboratory to produce the most representative results.

Expose Brand B and Brand C to the flame for 120 seconds (±10 seconds), ensuring each is rotated to present all grooved faces to the flame During this process, rotate the samples so that each grooved face is exposed to the flame for approximately 60 seconds, ensuring consistent and accurate testing conditions.

Position the B and C brands 500 mm from the lower edge of the specimen, placing them 370 mm apart and equidistant from the specimen’s longitudinal centreline If wires are used to anchor the brands, they should secure their position at the edges of the specimen In cases where the roof surface is uneven, the brands must be positioned 500 mm from the lower edge and at least 200 mm on either side of the centreline to ensure accurate testing The test laboratory is responsible for determining the exact placement that will yield the most critical (onerous) results, as illustrated in Figure 2.

End of the test

Terminate the test and extinguish any visible flames with water promptly when there is a risk to personnel safety, potential damage to equipment, fire penetration, or after 30 minutes have elapsed from the start of the test Take care to minimize damage to the specimen during fire suppression to ensure accurate results and safety.

Post-test examination

Commence post-test examination of the specimen within 30 min after the end of the test.

General

During and after the test, it is essential to observe, measure, and record the test parameters detailed in sections 11.2 to 11.5 for each specimen Dimensions should be expressed in millimetres, and all time measurements must start from the beginning of the test The progress of sustained flaming should be assessed based on the contact point of the flame with the specimen's surface, rather than the overall flame envelope.

If the roof is a flat roof with a pitch of 0°, then the concept of upwards and downwards is replaced by the direction of the wind and the opposite direction respectively.

External fire spread

11.2.1 Record the time necessary for the sustained flame to progress upwards 100 mm, 300 mm,

The distance measurements of 500 mm, 700 mm, 900 mm, 1,100 mm, and 1,300 mm are taken from any of the upper edges of the brand projections onto the exposed surface These measurements are applicable until they reach the upper edge (3.7) of the designated measuring zone (3.13) Ensuring accurate placement at these specified distances is essential for compliance with the standardized marking and measurement guidelines.

11.2.2 Record the time of occurrence and description of any burning material (flaming droplets or debris, see 3.10) falling from the exposed surface.

During the test, record the maximum extent of external fire spread both upwards and downwards, measured as the longest burned length from the edges of the projection of the brands onto the exposed surface, at the conclusion of the test.

Fire penetration

11.3.1 Record the time and nature of fire penetration (3.8), if this has occurred.

11.3.2 Record the time of occurrence and description of any flaming droplets or debris (3.10) falling from the underside of the specimen.

Opening

Damage

11.5.1 Record the extent and nature of internal damage (3.11) upwards, downwards, and laterally, measured during the post-test examination from the edges of the projection of the brands.

Record the maximum length of burned material in all directions—upwards, downwards, and laterally—in each functional layer during the post-test examination This measurement should be taken from the edges of the projected burn marks, in accordance with section 3.11 Accurate documentation of these dimensions is essential for evaluating fire spread and ensuring compliance with testing standards.

The test results must comprehensively report fire penetration, external fire spread, falling of flaming droplets or debris, and internal damage These critical findings are essential for classifying materials according to the standards outlined in ISO 12468-2, ensuring accurate assessment of fire safety performance.

The test report must include essential information such as a reference to ISO 12468-1, the testing laboratory's name and date, and details of the sponsor, product, and manufacturer, including any unknowns It should document the supervision level during specimen fabrication, provide a comprehensive description of the test roof deck, including attachment methods, material density, moisture content, and relevant standards Additionally, the report must describe measures taken to prevent flame spread around edges, specify the test pitch and room temperature at the start, and include all relevant fire exposure levels, test procedures, and results, preferably with photographs Observations and measurements conducted during and after the test are also vital to ensure a complete understanding of the test outcomes.

The study measures external fire spread by recording the time (in minutes and seconds) it takes for flames to reach various distances—100 mm, 300 mm, 500 mm, 700 mm, 900 mm, 1,100 mm, and 1,300 mm—from the origin point These measurements are taken at the upper edge of the measuring zone, extending in an upward direction to assess how quickly fire propagates across different spacing intervals.

2) time that any flaming material falls from the surface of the roof (see 3.10);

3) the burned length upwards, downwards, and laterally as measured from the nearest edge of the projection of the brands (see 11.5);

The article details the specific time, recorded in minutes and seconds, when fire penetration occurs during testing It describes the type of penetration observed, such as sustained flaming or glowing on the underside of the specimen Additionally, the report notes occurrences of flaming droplets or debris falling through the specimen or from the underside The description also includes whether an opening was created as a result of the fire penetration This comprehensive documentation ensures accurate assessment of fire resistance and material performance.

The report details the damage to the test specimen, focusing on the extent of non-flaming propagation, such as smouldering and glowing, alongside the internal damage observed in upward, downward, and lateral directions It also measures the maximum length of burned material within each functional layer, providing a comprehensive assessment of the specimen's structural integrity and fire resilience.

The report specifies the time at which the test is terminated and clearly states the reasons for termination, as outlined in section 10.4 Additionally, it defines the specific field of application for which the report is valid, as detailed in Annex A.

Test results obtained in a horizontal position shall apply to the roof system having pitches of less than 5°.

Test results obtained at 15° shall apply to the roof system having pitches from 5° to 20°.

Test results obtained at 30° shall apply to the roof system having pitches greater than 20° up to 70°.

Pitches greater than 70° are outside the scope of this International Standard.

When two tests are carried out at 0° and 30° and give the same classification, that classification applies to any pitch from 0° to 70°.

Test results obtained at an alternative specified pitch shall apply to the roof system for that pitch only.

A.2.1 Test with standard supporting decks

Test results obtained with standard supporting decks are applicable to all systems that utilize identical components, including thickness and installation methods, regardless of variations in deck types.

Test results obtained from a wood particleboard deck, as defined in section 6.2.1.1, with gaps between planks not exceeding 0.5 mm, are applicable to any continuous wooden deck with a minimum thickness of 12 mm and similar gap specifications.

0,5 mm and b) any non-combustible continuous deck with a minimum of 10 mm.

A.2.1.3 Test results obtained with a wood particleboard deck as defined in 6.2.1.1, with gaps of

A gap of 5.0 mm ± 0.5 mm between planks applies to all wooden continuous decks, including those made from planks with plain edges and any non-combustible decks This spacing standard ensures safety and structural integrity for various types of decks, whether constructed from wood or non-combustible materials, with gaps not exceeding 5.0 mm Properly maintaining this gap is essential for compliance with building regulations and fire safety standards.

A.2.1.4 Test results obtained with a trapezoidal profiled steel deck as defined in 6.2.1.2 shall apply to a) any profiled steel deck and b) any non-combustible continuous deck with a minimum thickness of 10 mm.

A.2.1.5 Test results obtained with a trapezoidal aluminium deck as defined in 6.2.1.2 shall apply to a) any profiled aluminium deck with thickness greater than or equal to the tested thickness,

`,`````````,,,``,`,,,,,`,```,,-`-`,,`,,`,`,,` - b) any profiled steel deck, and c) any non-combustible continuous deck with a minimum thickness of 10 mm.

A.2.1.6 Test results obtained with a reinforced calcium silicate board as defined in 6.2.1.3 shall apply to any non-combustible continuous deck with a minimum thickness of 10 mm.

A.2.2 Test with alternative supporting deck

Test results obtained with an alternative supporting deck shall apply only to that roof system.

Any roof system, which satisfies requirements related to Level A, is deemed to satisfy the same requirements at Level B or Level C without any supplementary test.

Tiêu đề	External Exposure Of Roofs To Fire — Part 1: Test Method
Trường học	University of Alberta
Thể loại	tiêu chuẩn
Năm xuất bản	2013
Thành phố	Switzerland

Định dạng
Số trang	32
Dung lượng	1,23 MB