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H90 Tensile fabric coverings

GENERAL

110 SINGLE LAYER FABRIC COVERING SYSTEM
• System manufacturer: site specific .
• Fabric: site specific .
- Warp and weft: Submit proposals .
- Strength: Tensile dry strength to BS EN ISO 1421 .
- Stiffness: Submit proposals .
- Bow: In weft direction to be the lesser of 20 mm or 1.5 in 100 .
- Coating: Polytetrafluoroethylene (PTFE) .
Coverage: Even to both sides to achieve uniform thickness and translucency .
Surface quality: Smooth with no significant discontinuities or blemishes when
viewed externally from a distance of 2.5 m in directional sunlight .
- Colour: site specific .
- Fire resistance: site specific .
- Translucency: site specific .
• Seams: Submit proposals .
• Connection to supporting structure: Submit proposals .
• Fixings: Submit proposals .
• Supports: Submit proposals .
• Other requirements: Submit proposals .

150 CONTRACTOR DESIGN
• Tensile fabric coverings: Complete detailed design and submit before
commencement of fabrication.
• Related works: Coordinate with supporting structure and interfaces in detailed
design.

PERFORMANCE

210 PERFORMANCE
• Roof coverings: Secure, free draining and weathertight.
• Deflections and other movements: Make full allowance.
• Design life: 15 years .

240 INTEGRITY: CONTRACTOR DETERMINED PARAMETERS
• Requirement: Tensile fabric coverings and supporting structure must resist wind
loads, dead loads and design live loads and accommodate deflections and
thermal movements without damage.
• Design wind loads: Calculate in accordance with BS EN 1991-1-4.

260 WATER PENETRATION
• Requirement: Under site exposure conditions, water must not penetrate onto
internal surfaces or into cavities not designed to be wetted.

RotF generic (intermediate) NBS 2014 6118-AEW-XX-XX-NBS-A-01