Cast stone Data
All cast stone units are manufactured to BS EN 771-5 (units with all dimensions 650mm or less and not containing reinforcement or fixings).
All units are decorative and are not designed to be load bearing. The structural stability of all units in their finished state should be approved by the structural engineer carrying out the overall design for the project. Wind loading on large window features, sections of stonework, supporting lintels and fixings to cast stone units should also be considered early in the design process.
Due care and attention should also be given to the differential shrinkage and expansion rates between clay and cast stone units when employed in combination. Site operatives must be made aware of the need to support and protect all cast stone units in their temporary state to negate the risk of any load being implied upon them whilst construction is taking place for example window heads.
Consideration must be given to the creation of suitable movement control joints for cast stone. Generally, they should be spaced at a maximum
of 6m centres.
Compressive Strength:
Units to BS EN 771-5:2011 are Category 1 with a mean normalised compressive strength of 25N/mm² (perpendicular to the bed face)
Gross Dry Density:
2000kg/m3 Tested to BS EN 772-13
Thermal Conductivity:
1.00W/mK (λ10,dry,unit, S1)
based on table value from BS EN 1745
Water Absorption:
p=50%
Freeze Thaw Resistance:
As Table 15 of PD6697:2010
Recycled Content:
None
Tolerance Category:
D1 (±2mm for length & height)
Cast Stone Heads | Cast Stone Cills | Cast Stone Coping |
Compressive Strength: |
Units to BS EN 771-5:2011 are Category 1 with a mean normalised compressive strength of 25N/mm² (perpendicular to the bed face) |
Gross Dry Density: |
2000kg/m3 Tested to BS EN 772-13 |
Thermal Conductivity: |
1.00W/mK (λ10,dry,unit, S1) based on table value from BS EN 1745 |
Water Absorption: |
p=50% |
Freeze Thaw Resistance: |
As Table 15 of PD6697:2010 |
Recycled Content: |
None |
Tolerance Category: |
D1 (±2mm for length & height) |