Leaf format Single
Operation Hinged
Material Aluminium
 
 
 

S-50TB are 915x760mm hatches designed to be used for personnel access where a fixed vertical ladder is being used. They offer easy one-hand operation to the fully open or close position, which provides the ladder user with the security of having one hand firmly on the ladder at all times.

They have a thermally broken cover and frame design, which improves thermal performance giving  a high degree of thermal efficiency. They have 75mm of polyisocyanurate insulation to both the upstand and the cover.

In addition, the cover is fitted with a closed-cell EPDM gasket designed to reduce the air leakage though the closed cover, ensuring that the air leakage requirements of Building Regulations Part L are achieved.

Performance standards

  • U-Value .278 W/m2K (homogeneous)
  • 1.39 W/m2K (Developed Area)
  • BS EN 12207:2000 Air Permeability
  • 4.83 m3/hour/m2 at 600 Pa
  • BS EN 12208:2000 Water Tightness Class 9A
  • BS EN 12210:2000 Wind Resistance Class E2400
  • BS EN 1991-1 Snow Load 1200 Pa for 1 hour
  • BS 8200 Impact Resistance Pass
  • BS En ISO 140 Acoustic 25dB
  • BS En 1627-1630 Security Pass
  • Wind Speed With Open Cover 30 m/s


S-50TB are 915x760mm hatches designed to be used for personnel access where a fixed vertical ladder is being used. They offer easy one-hand operation to the fully open or close position, which provides the ladder user with the security of having one hand firmly on the ladder at all times.

They have a thermally broken cover and frame design, which improves thermal performance giving  a high degree of thermal efficiency. They have 75mm of polyisocyanurate insulation to both the upstand and the cover.

In addition, the cover is fitted with a closed-cell EPDM gasket designed to reduce the air leakage though the closed cover, ensuring that the air leakage requirements of Building Regulations Part L are achieved.

Performance standards

  • U-Value .278 W/m2K (homogeneous)
  • 1.39 W/m2K (Developed Area)
  • BS EN 12207:2000 Air Permeability
  • 4.83 m3/hour/m2 at 600 Pa
  • BS EN 12208:2000 Water Tightness Class 9A
  • BS EN 12210:2000 Wind Resistance Class E2400
  • BS EN 1991-1 Snow Load 1200 Pa for 1 hour
  • BS 8200 Impact Resistance Pass
  • BS En ISO 140 Acoustic 25dB
  • BS En 1627-1630 Security Pass
  • Wind Speed With Open Cover 30 m/s


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Bilco UK Ltd
No 20 Park Farm Business Centre
Fornham St Genevieve
Bury St Edmunds
IP28 6TS
Tel: 01284 701696
Fax: 01284 702531
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Type S-50TB fixed ladder access hatch