STREETSCAPE GUIDANCE

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HOME INTRODUCTION PART A A vision for London’s streets PART B From strategy to delivery PART C New measures for new challenges PART D Balancing priorities PART F Appendix PART E Physical design and materials SECTION 6 Introduction SECTION 7 High quality footways SECTION 8 Carriageways SECTION 9 Crossings SECTION 10 Kerbside activity SECTION 11 Footway amenities SECTION 12 Safety and functionality SECTION 13 Street environment SECTION 14 Transport interchanges Streetscape Guidance [Part E – Physical design and materials] High quality footways 68 Concrete slabs for footways TLRN standards: Colour: Grey natural Finish: Pimpled Dimensions: 900x600x65mm Application: Preferred for extensive new areas of paving across most urban settings. • Concrete and artificial stone paving (ASP) are the most common paving materials used on the TLRN and are TfL’s preferred choice for large parts of the network Figure 64: 900x600mm concrete slabs Advantages: • Cost effective • Convenient to source • Easy to cut and dress • Can last between 20-40 years • Can be reinforced to avoid cracking where vehicles are likely to mount the kerb Disadvantages: • The general appearance is utilitarian which may not be sufficient for special areas • Can crack easily if mounted on poor construction base • A moderate maintenance regime is required Considerations: • When considering a phased approach, designers should recognise that initially the interface will be evident between existing and new paving but will wear to provide a more seamless appearance • Designers should work with adjacent property owners to better integrate private forecourts and promote a seamless use of paving materials across the footway • Where the slabs are required to be cut, 600x450mm, 600mm and 750mm may be used to reduce onsite cutting and wastage. These sizes should not be used as standard within the footway without SDRG approval. Loading requirement must be considered when designing joints and structure. It is important to evaluate mechanical sweeping when designing a footway and in such cases butt finishes should be avoided. Bedding materials should be selected with equal care dependant on loading Construction: • Setting out of slabs including their orientation should be specified and based on existing interfaces or centrelines • Chamfered edge concrete slabs should not be used Figure 65: London Bridge is paved in concrete
HOME INTRODUCTION PART A A vision for London’s streets PART B From strategy to delivery PART C New measures for new challenges PART D Balancing priorities PART F Appendix PART E Physical design and materials SECTION 6 Introduction SECTION 7 High quality footways SECTION 8 Carriageways SECTION 9 Crossings SECTION 10 Kerbside activity SECTION 11 Footway amenities SECTION 12 Safety and functionality SECTION 13 Street environment SECTION 14 Transport interchanges Streetscape Guidance [Part E – Physical design and materials] High quality footways 69 Granite slabs for footways TLRN standards: Colour: Silver grey (also available in other colours) Finish: Fine-picked Dimensions: 900x600x65mm slabs (standard) Application: • Suitable in areas of high civic importance or adjacent to large new developments • Granite is typically used as a paving surface within a distinct and defined area to highlight the area’s importance • Historically, granite was used extensively for footways and carriageways as small setts. More recently larger granite slabs have proved to be a durable and attractive material for footways. Bespoke treatments, including alternative dimensions and colours which are not standard, require SDRG approval Figure 66: 900x600mm granite slabs Advantages: • High quality, organic appearance • Durable, long lifespan, reusable and wears well with minimal colour fade • Combines well with other footway materials • Can be cut to size and dressed as required • Relatively low maintenance • A range of finishes and textures are available to achieve different effects using the same stone. Bespoke finishes must be approved by the SDRG Disadvantages: • High material cost • Less convenient to source • Installation can be more time consuming and costly than concrete Considerations: • The replacement of broken slabs that accurately colour match existing paving can be difficult as sourcing the same stone can be costly and time consuming • Where the slabs are required to be cut, 600x450mm, 600mm and 750mm may be used to reduce onsite cutting and wastage. These sizes should not be used as standard within the footway without SDRG approval • There are some circumstances where 100x100mm or 100x200mm stone setts may be used (see Carriageways for further guidance) • Loading requirement must be considered when designing joints and structure. It is important to evaluate mechanical sweeping when designing a footway and in such cases butt finishes should be avoided. Bedding materials should be selected with equal care dependant on loading Construction: • Setting out of slabs including their orientation should be specified and based on existing interfaces or centrelines Figure 67: Euston Circus uses two shades of granite paving
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STREETSCAPE GUIDANCE

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