Potters Ease the Way Forward with Seismic Ceiling Design

Due to the recent amendments in Building Code regulations — NZS 1170.5 Amendment (Effects on Suspended Ceilings), suspended ceilings must now be seismically designed to a higher ULS level than the previous (SLS) level.

This means that all suspended ceilings must now be designed to withstand Ultimate Limit State level earthquakes in order to comply with Clause B1/ VM1 of the NZ Building Code.

ULS design is a specifically engineered design which must be carried out by a chartered professional engineer. Generic seismic design guides previously provided by ceiling manufacturers typically only allow design for SLS level earthquakes, and are no longer best practice.

Potter Interior Systems will arrange to provide full seismic ceiling design and PS-1 as required by councils (for building consent) upon request for all Potter Suspended Ceiling Systems specified in NZ, to ensure that Potter ceilings are designed for Ultimate Limit State events.

The installers' requirement is to ensure each ceiling complies with the building code. The appropriate method of achieving compliance is up to the ceiling installers, project managers and consent authority. It is also likely that projects requiring specific seismic designs will also require construction monitoring and a PS-4 Construction Review Statement — to ensure the seismic details are actually installed in accordance with the design.

The completed seismic design document should effectively minimise requests for information (RFI's) by simplifying bracing plans and installation details and fully outlining specific seismic ceiling components required.

For any queries with regard to the seismic ceiling design or to ask Potter Interior Systems to arrange ULS level design for a current project, please contact Potters .

AMF Thermatex Acoustic Ceiling Tile

Potter Interior Systems

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AMF Thermatex Acoustic is a 19 mm thick suspended ceiling tile made from a specially perforated mineral board and an acoustic fleece facing.

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Exposed grid system, demountable ceiling
Free span system, with exposed or concealed suspension
Bandraster system, with exposed or concealed suspension
Concealed system, panels demountable / non demountable

Sound absorption: αw = 0.65H as per EN ISO 11654.
NRC = 0.70 as per ASTM C 423-01
Sound attenuation: Dn,c,w = 39 dB as per EN 20140-9 (19 mm thickness). Dn,c,w = 40 dB as per EN 20140-9 (semi-concealed planks)
Light reflectance: up to 88%
Thermal conductivity λ = 0.052 – 0.057 W/mK as per DIN 52612
Humidity: up to 95 % RH
Clean room: Class 3 as per ISO 14644-1

AMF Thermatex Alpha One — Suspended Ceiling Tile

Potter Interior Systems

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Thermatex Alpha One is a wet-felt mineral tile which provides high sound absorption values.

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Exposed Grid System, demountable ceiling

Building material class: A2-s1, d0 as per EN 13501-1
Sound absorption: EN ISO 354 αw=1.00 as per EN ISO 11654
NRC = 1.00 as per ASTM C 423
Sound attenuation: 29 dB as per ASTM E413-10
Light reflectance: Up to 88%
Thermal conductivity:λ = 0.040 W/mK as per EN 12667
Humidity up to 95 % RH
Clean room Class 4 as per ISO 14644-1

AMF Thermatex dB Acoustic — Ceiling Tile

Potter Interior Systems

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AMF Thermatex dB Acoustic is the ideal solution for high sound attenuation requirements.

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Ideal solution for high sound attenuation requirements

Building material class: A2-s1, d0 as per EN 13501-1
Sound absorption: αw = 0.65 as per EN ISO 11654 NRC = 0.70 as per ASTM C 423-01
Sound attenuation: Dn,c,w = 41 dB as per EN 20140-9 (24mm thickness)
Light reflectance: Up to 88%
Thermal conductivity: λ = 0.052 – 0.057 W/mK as per DIN 52612
Humidity: Up to 95% RH
Sound attenuation CAC = 41 dB as per ASTM E413-10
Sound insulation Rw = 24 dB as per EN ISO 10848
Fire resistance Group 1-S (as per ISO 5660 Parts 1 and 2)

AMF Thermatex SF Acoustic Ceiling Tile

Potter Interior Systems

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This elegant AMF performance suspended ceiling with the attractive SF shadow edge requires minimal void as the tile is installed purely from below.

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AMF Thermatex SF-Acoustic ceiling tiles can be used in all building types throughout New Zealand — seismic ceiling design is recommended as with all new suspended ceiling installations.

They are ideal for use in ceilings with minimal plenum space where high acoustic absorption is required.

Building material class A2-s1, dO as per BS EN 13501-1
Fire resistance Group 1-S (as per ISO 5660 Parts 1 and 2)

AMF Thermatex Silence — Ceiling Tile

Potter Interior Systems

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AMF Thermatex Silence is a fleece-coated ceiling made from two mineral boards bonded together.

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System: Exposed Grid System, demountable ceiling

Building material class: A2-s1, d0 as per EN 13501-1
Sound absorption:

EN ISO 354 αw = 0.85 (H) as per EN ISO 11654
NRC = 0.90 as per ASTM C 423

Sound attenuation: Dn,f,w = 44 dB as per EN 10848 (43 mm thickness, according to test certificate)
Light reflectance: up to 88%
Thermal conductivity: λ = 0.052 - 0.057 W/mK as per DIN 52612
Humidity: up to 95% RH

EN ISO 354 αw = 0.85 (H) as per EN ISO 11654
NRC = 0.90 as per ASTM C 423

AMF Thermatex Thermofon Ceiling Tile

Potter Interior Systems

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Thermatex Thermofon provides high sound absorption.

System: Exposed system, demountable ceiling

Building material class: A2-s1, d0 as per EN 13501-1
Sound absorption: αw = 0.80H as per EN ISO 11654 NRC = 0.85 as per ASTM C 423-02a
Sound attenuation: Dn,c,w = 15mm - 28 dB as per EN 20140-9 (according to test report) // 18mm - 24 dB as per EN 20140-9
Light reflectance: Up to 88%
Thermal conductivity: λ = 15mm - 0.038 W/mK as per EN 12667 // 18mm - 0.040 W/mK as per EN 12667
Humidity: Up 95% RH

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