Farrat Structural Thermal Break Connections
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FTB-UK-Farrat Structural Thermal Breaks-17b Far ratStructural Thermal Break Connections APPROVAL INSPECTION TESTING CERTIFICATION

FTB-Farrat Structural Thermal Breaks-17b Introduction Structural Thermal Break plates are high performance thermal insulators used between both horizontal and vertical connections of internal and external elements to prevent thermal / cold bridging. Structural Thermal Breaks provide a simple, economical and extremely effective solution to meeting Part L of the Building Requirements by way of reducing both heat loss and the risk of condensation. Farrat Structural Thermal Breaks can also be used in hot climate conditions to insulate the cool, air conditioned interior, from the hot outside...

Why Choose Farrat Structural Thermal Breaks? Constantly driven by Engineering Excellence, we continue to lead the way in the development of the Structural Thermal Break Plate market. Changes in Legislation in response to climate change and energy saving, has meant that reducing energy loss and the risk of condensation has grown in importance - as has the construction industries' preference for Farrat Structural Thermal Breaks. Farrat proudly supply Structural Thermal Break plates for the UK and overseas markets. Farrat Structural Thermal Breaks have British Board of Agrèment Certification...

FTB-Farrat Structural Thermal Breaks-17b Farrat Structural Thermal Breaks - Material Properties Farrat Structural Thermal Breaks are manufactured from high performance materials. We offer two grades, Farrat TBK and Farrat TBL. They both have British Board of Agrèment Certification. MATERIAL PROPERTIES Characteristic Compressive Strength, fck (N/mm², MPa) Design value for compressive strength, fcd (N/mm², MPa) Elastic Modulus (N/mm², MPa) Density (Kg/m³) Water Absorption (%) Maximum sheet size (mm) + Multiple plates can be provided for applications where thicknesses greater than 25mm are...

Procurement Design Approvals Project Engineer Steelwork Fabrication Material (Thermal conductivity) & Thickness Responsibility - Thermal Performance 2 Responsibility - Structural Performance • Fully Designed Connection or • Performance Specification “Thermal Break” Project DocumentationDrawings + Specification Steelwork Fabrication “Design Office” Specification National Building Specification (NBS) - Section G10/ Project Architect CONSTRUCTION SITE Fabrication Drawing • Material • Plate Size & Thickness • Hole Size & Position • Quantity 5 Thermal Modelling Specialist Farrat Technical...

FTB-Farrat Structural Thermal Breaks-17b Design Consideration - Thermal Performance Thermal Performance of the Building Envelope There are very few standard construction details between projects and consequently the detailing of the building envelope and penetrations through the envelope can vary significantly. The calculation of thermal performance and compliance with codified requirements can be complex. There are two aspects to thermal performance of the building envelope, heat loss and condensation risk. Both of these issues are covered by Building Regulations, and guidance on meeting...

Fig 7.3 Predicted temperature distribution with no thermal break. Figure 7.3 shows the predicted temperature distribution through the penetration without a thermal break. The temperature on the steelwork on the warm side of the cladding system is 9.8°C and the heat loss (χ-value) is 1.31 W/K. Fig 7.4 Predicted temperature distribution with Farrat TBK structural thermal pad and thermal isolating washers. Figure 7.4 shows the predicted temperature distribution with a Farrat TBK Structural Thermal Break pad. The temperature on the steelwork on the warm side of the cladding system is increased...

FTB-Farrat Structural Thermal Breaks-17b Design Consideration - Structural Performance Thermal breaks are normally used in protected façades or roof systems. In general, steelwork connections should be designed in accordance with the latest SCI guidance publications as listed below: Simple Connections SCI-P212: Joints in steel construction. Simple connections (BS 5950-1). SCI-P358: Joints in steel construction. Simple joints to Eurocode 3. Moment Connections SCI-P207: Joints in steel construction. Moment connections (BS 5950-1). SCI-P398: Joints in steel construction. Moment joints to...

1. Applied compressive stress to thermal break The designer must check that the compressive stress applied to the thermal break plate is less than the design compression strength of the thermal break material. This is achieved by satisfying the expression given below. is the applied compression force (ULS) is the design value for compressive strength (thermal break) is the depth of the compression zone on the thermal break is the width of the compression zone on the thermal break The compression force Fc can be obtained from published data for standard moment connections (see SCI-P207 and...

FTB-Farrat Structural Thermal Breaks-17b 2. Additional rotation due to compression of thermal break For moment connections, such as those supporting balconies, the rotation of the connection under load is an important design consideration, typically for aesthetic and serviceability requirements. The amount of compression of the thermal break plate ∆T is calculated as given in expression: where: is the thickness of the thermal break plate is the stress in the compression zone of the thermal break plate (SLS) is the elastic modulus of the thermal break plate The additional rotation of the...

3. Bolt shear resistance A thermal break plate in a connection must be considered as a pack in terms of the connection design. Where packs are used in connections there are detailing rules that should be followed and depending on the thickness of packs it may be necessary to reduce the shear resistance of the bolts within the connection. ❫ The number of packs should be kept to a minimum (less than 4) ❫ The total thickness of packs tpa should not exceed 4d/3, where d is the nominal diameter of the bolt is nominal bolt diameter is the total thickness of packs ❫ If tpa exceeds d/3 then, the...