TIE SELECTOR

Selection of Wall Ties - BS5628-1:2005 and BS5268-6:1

TYPE
APPLICATION
DENSITY
GEOGRAPHICAL LOCATION (BS6399)
Type 1 (TT1) Heavy Duty Tie suitable for most building sizes and types up to any height.
2.5 ties/m2. To achieve this tie density it is normal practice to install at 900mm centres horizontally and 450mm centres vertically with successive rows staggered. 3 – 4 ties/m2 at unbonded edges.
Suitable for most sites but where the buildings are relatively tall or an unusual shape, the tie provision should be calculated.
Type 2 (TT2) General Purpose Tie for Domestic and small commercial buildings up to 15 metres in height.
As Type 1
Suitable for flat sites where the basic wind speed is up to 31m/s and altitude is not more than 150m above sea level.
Type 3 (TT3) Basic Tie suitable for some domestic and small commercial developments up to 15 metres in height.
As Type 1
Suitable for flat sites in towns and cities where the basic wind speed does not exceed 25m/s and altitude is not more than 150m above sea level.
Type 4 (TT4) Light Duty Wall Tie suitable for box form domestic dwellings with leaves of similar thickness up to 10 metres in height.
As Type 1
Suitable for flat sites in towns and cities where the basic wind speed does not exceed 25m/s and altitude is not more than 150m above sea level.
Type 6 (TTTF) Timber Frame Tie suitable for domestic houses and small commercial developments up to 4 storeys.
4.4 ties/m2
Suitable for flat sites in towns and cities where the basic wind speed does not exceed 25m/s and altitude is not more than 150m above sea level.

Approved document E

TYPE
APPLICATION
DENSITY
GEOGRAPHICAL LOCATION (BS6399)
Type A (TT4) Internal Separating Walls New Build Attached Dwellings.
2.5 ties/m2
Any site – anywhere in the British Isles – restrictions may apply to particularly tall buildings and coastal/exposed sites.

Recommended lengths/type for each cavity width

CAVITY WIDTH
LENGTH OF WALL TIE
TIE TYPE
50mm – 75mm 200mm
TT4, TT2, TT1
76mm – 100mm 225mm or 250mm
TT4, TT2, TT1
101mm – 125mm 250mm
TT4, TT2, TT1
126mm – 150mm 275mm or 300mm
TT1

Tecties, Unit 4 Hurstfield Industrial Estate,
Hague Bar, New Mills, High Peak, SK22 3AT

t: 01663 749361    e: sales@tecties.co.uk

LOCAL STOCKISTS

Tecties, Unit 4 Hurstfield Industrial Estate,
Hague Bar, New Mills, High Peak, SK22 3AT

t: 01663 749361    e: sales@tecties.co.uk

LOCAL STOCKISTS

t: 01663 749361

Tecties, Unit 4 Hurstfield Industrial Estate,
Hague Bar, New Mills, High Peak, SK22 3AT

t: 01663 749361    e: sales@tecties.co.uk

LOCAL STOCKISTS

t: 01663 749361

Tecties, Unit 4 Hurstfield Industrial Estate,

Hague Bar, New Mills, High Peak, SK22 3AT

t: 01663 749361    e: sales@tecties.co.uk

LOCAL STOCKISTS