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Roof hatch type RHT-D double lid, flat

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Specifications

Certificates:

KOMO:SKG.0372.0503

 

Special dimensions:........ x ........ mm

  • Maximum size: 2500 x 5000 mm
  • Special sizes are supplied in aluminium

 

Gorter® - completely assembled with:

  • Thermal separated and insulated aluminium construction
  • Counterbalancing system for assisted opening and controlled closing
  • Wind and weathertight double sealing
  • Lid that engages automatically in open position, with one hand release
  • Two point latch for inside operation, with padlock hasps.
  • Diagonal handrail to safely enter and leave roof hatch
  • Option: four powerful motors with closure order control

 

Performance:

  • Resistance to permanent loads (Eurocode EN 1993-1-1): 1050 kg/m²
  • Insulating (EN-ISO10077-2): Uw ≤ 0.32 W/(m².K)

  • Sound reduction (EN-ISO140-3): 26 dB
  • Watertightness (EN 12208): Class E 650
  • Resistance to wind load (EN 12210): Class E 3000
  • Resistance to snow loads (EN 1991-1-3): 3.97kN/m²
  • Impact hard body (EN 356): Class P5A
  • Impact soft body (EN 13049): Class 5
  • Air permeability (EN 12207): Class 3

 

Standard coating:

Powder coated in RAL7047 (outside) and RAL9010 (inside). 

 

Attention: 

  • Lid is provided with internal stiffeners, small welding spots can show on outside
  • To prevent damage and deformation don’t open lid with strong winds.

Options

Gorter® Electrical Operation

Electrical operation - TIM50

electrical operation tim50The Gorter TIM50 electrical operation is a solution, which can be fitted on any Gorter RHT roof hatch in special sizes. The two powerful electric motors are always fitted as a pair on both sides of the lid. The motors are pre-fitted from the factory.

 

Operation and control 230Vac

The Gorter TIM50 is a system with two motors and a control unit. As a standard the system is supplied with a compact surface mount keypad and wireless remote control for easy operation.

Electrical installation:

The drives and the wiring must be installed by a certified installer

 

Electrical operation for linking to a fire alarm systems

electrical_operation

Depending on the access door type, the weight of the cover and the application, we can install one or more gear rack drives. These drives are available in 24 Vdc or 230 Vac.
Operation and control 230Vac

This is the simplest system with 1 motor. It can be operated with an integrated or surface-mounted switch, not included.
Operation and control 24Vdc
Operation of one or more drives is controlled by a control box with rectifier that is connected to the electricity network.
Features

  • Communication with central alarm system, possibly combined with emergency switch
  • Programmable
  • Operation control of other objects
  • Control by automatic detectors - smoke, rain, wind, fire etc.
  • Automatic sequence control of two covers that are overlapping
  • Automatic stop in case of unequal load or overload
  • etc.

Depending on the features we will recommend a suitable control box type.
Emergency hatches and doors:
It is of life importance that an emergency door opens after a break down of the electrical system. For those reasons a control box can be provided with a built-in emergency power pack.
Electrical installation:

The drives and the wiring must be installed by a certified installer.

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Gorter roof hatches with two covers can be used as material or lifting hatches, but in most situations, they provide practical and safe access to flat roofs for maintenance work. Roof hatches can be installed on flat roofs with a maximum slope of 30°.

 

Sizes

Gorter roof hatches with two flat covers are available when the width (standard clearance) is larger than 1,100 mm.

 

Roof slope

This roof hatch can be used on roofs with a suitable slope or pitch. If the roof does not have a slope or you want to use the hatch in an area with heavy snowfall, it is better to choose the RHT-D with two sloping covers.

 

Fully thermally broken

The Gorter RHT-D roof hatch with two flat covers has a fully thermally broken curb and cover, and a proven high insulation value of Uw ≤ 0.319 W/(m².K) This minimises the chance of condensation forming and guarantees energy cost savings.

 

Gorter RHT roof hatch with two covers:

  • Tailor-made
  • TÜV NORD, Aboma and KOMO® certified
  • Fully thermally broken curb and cover
  • Safe to operate with one hand or electric controller
  • 10-year warranty on the roof hatch
  • High-quality aluminium construction, 3x lighter than steel, strong and corrosion-free
  • Burglar- and sound-proof

Read more about the advantages of Gorter roof hatches here

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