NBS Source
D-marc™ 105

Application

Applications include preventing access to hazards during regular rooftop maintenance or to provide safe access across the roof.

Description

Demarcation system which can withstand wind speeds of up to 105 mph due to the unique design of its base and upright which also eliminates any potential damage caused by oscillating. Its three connecting pins do not protrude through the base and therefore do not come into contact with the roof structure, ensuring it cannot damage the roof even if it begins to oscillate. It has a non-protruding integral hook incorporated inside the lattice structure which ensures the chain cannot lift off the upright in high winds.


Feature and benefits:

  • Withstand wind speeds of up to 105 mph.
  • Trapezoid base shape is aerodynamically designed with four pyramidal sloped sides at 30°, which, in extensive wind tunnel testing was shown to be the most stable shape.
  • The underside of the base is sculpted ensuring the weight is distributed to its perimeter, minimising the effect of wind uplift.
  • The lattice structure of the upright ensures the wind circulates around and through the system rather than pushing it over.
  • D-marc™ 105 is classed as a form of Collective Protection in accordance with the HSE’s hierarchy of risk management as set out within the Working at Height Regulations 2005 (WAHR).
  • Minimum distance from fall hazard: 2 m.


Components:

  • Bases.
  • Uprights.
  • Chains and connecting links.


General information

Material

Rubber

Base: Manufactured from recycled tyres, complying with BS 4790 for flammability, BS 1006 for UV stability and BS 7188 for slip resistance.

Stainless steel

Upright: Manufactured from stainless steel grade 1.4301 (304). The powder coating process not only enhances lifespan, it gives a quality finish to the product.


Plastic

Plastic chain and connecting links: Fully weatherproof, resistant to salt, chemicals and frost. They are also colour-fast, anti-magnetic and can be used within a temperature range of -10 to +75ºC.

Size

500 x 500 x 72 mm

  • Base size (l x w x h).
  • Upright: 960 mm high.
  • Chain: 25 m lengths.
  • Installed height: 950 mm.


Uniclass 2015

Ss_25_14_67_70 Rope or chain fencing systemsPrimary

CAWS

L35/170 Guarding system

Specification data - Rope or chain fencing systems Enhanced data

Design

As drawing.

Insert reference.

BaseMaterial

Base materials.

Recycled tyres.

Base: Manufactured from recycled tyres, complying with BS 4790 for flammability, BS 1006 for UV stability and BS 7188 for slip resistance.

Uprights

Uprights materials.

Stainless steel.

Upright: Manufactured from stainless steel grade 1.4301 (304). The powder coating process not only enhances lifespan, it gives a quality finish to the product.

Chain

Chain material.

Plastic.

Plastic chain and connecting links: Fully weatherproof, resistant to salt, chemicals and frost. They are also colour-fast, anti-magnetic and can be used within a temperature range of -10 to +75ºC.

Size:

Base size (L x W x H).

500 x 500 x 72 mm.

Upright height

960 mm.

Length

Chain length.

25 m.

Height

Installed height.

950 mm.