RSI Biomass Upstand

Surespan RSI Biomass aluminium single or double leaf upstand floor access covers are rated at 2.5 or 5kN/m ² loading. The patent marine alloy frame incorporates a single or double unbroken EPDM seal, to help prevent the ingress of dirt and moisture offering water and near airtight seal. Vented, insulated and airtight options are available.

Our biomass access covers come complete with grade 316 stainless steel gas spring assisted lids, which are locked in the open position with safety hold open stays to prevent against accidental closure. A stainless steel slam action cab lock is fitted as standard to lock the lids, these locks are easily opened from the inside and key operated from the outside.

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+44 (0)1922 711185


  • Custom made to any size
  • Rated up to FACTA Class AA vehicle loading
  • Incorporated double unbroken EPDM seals
  • Marine grade aluminium cover
  • High grade magnesium alloy tread plate lid
  • Water and near airtight seal
  • L03 standard Tee lock
  • Rw25dB acoustic rated
  • Gas spring assisted operation
  • Hold open stay – against accidental closure

Suggested Sizes

Product RefStructural Opening SizeWeight
RSI 60.60600 x 60033kg
RSI 75.75750 x 75043kg
RSI 90.75900 x 75047kg
RSI 90.90900 x 90053kg
RSI 100.1001000 x 100061kg
RSI 120.1201200 x 120077kg
RSI 120.1801200 x 1800102kg
RSI 150.1501500 x 1500104kg

Mushroom Vents

Manufactured in stainless steel, the unique design prevents the ingress of rain or foreign bodies, while internal mesh stops deliberate interference and vandalism. Mushroom Ventilators can be manufactured to any height to suit your requirements.


Available as single or double leaf floor access cover.

Biomass Cover
Single Leaf
Double leaf floor access
Double leaf

Non-Slip surface coating

Surespan floor access covers can be manufactured using calcined bauxite, a special surfacing material which has been independently tested and proven to provide high friction contact. It has been specially developed to provide an aesthetically pleasing, high durable surface.

Suregrip is available in on any size floor access cover and can be customized for any application, logo or signature which can be provided in a range of colours.


Contact us

Monday - Thursday 8:30 AM - 5:00PM
Friday 8:30AM - 4:30PM
Saturday - Sunday Closed
Control Options

Gas Spring Operation

Concealed gas spring

Standard roof hatch comes complete with gas spring assisted opening to ensure minimum amount of effort to open the double skinned aluminium lid.

The lid will have the provision to lock in the open position with a safety hold open stay to prevent against accidental closure.

Electric Operation


Can be supplied with associated control panels & accessories.

Additional Electric Features

Electric control unit

Electrical Control Unit.

Push button for domestic use.

Key switch for domestic use.

Push button for industrial use.

Key switch for industrial use.

Hydraulic Operation

Fitted as Standard
Hydraulic operation

Hydraulic system comprises of operating cylinders with a hand pump. A typical access cover panel would take approximately 60 seconds to open from a closed position. Closing is achieved by releasing the hydraulic oil from the cylinder; the weight of the cover is sufficient to push the cylinder closed.

Additional Hydraulic Features

Electrical Control Panel.

Push Button

Pneumatic Operation

Pneumatic operation

Pneumatics provide a clean and efficient way of operating our hatches in environments where compressed air is freely available or is preferred to hydraulic cylinders or electrical actuators.

The system comprises of operating cylinders fed from a manual control manifold that can connect to a ring main pneumatic supply.

Additional Pneumatic Features

Electrical Control Panel.

Key Switch.

Locking Options


Standard cablock and Tee key.


Locking padlock box – additional security.


Electrical interlock – micro switch.


Shoot bolt lock – internal only.


Additional cam lock to ensure positive sealing.


Electrical locking box linked to a BMS system.


Concealed dead lock with cover plate.


Shrouded hasp & staple for padlock by others.

Optional Features
Fire rated

4 hours fire resistance.

Acoustic rating

Sound reduction of 45db Rw.

Powder coating

Underside powder coating (RAL colours).

Glass window

Glass viewing window.

Retractable safety grid.

Retractable safety grid.

Stainless steel

Stainless steel access hatch.

FACTA Loading Classes
Class A

Class A

Internal and external areas which can only be used by pedestrians or cycles i.e. toilets, changing rooms, footways and cycle tracks.

Class AA

Class AA

Very light industrial areas, where small trolleys and private cars/vans can manouvre i.e. Domestic driveways, trolley parks, hospital wards.

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