ExpandaChem Flat Pack Bunded Storage Container. Hand Portable Metal Liquids Store.

All New ExpandachemExpandaChem is a flat-packed hand portable bunded liquids store.

Similar to the best selling Expandastore the ExpandaChem flat pack bunded storage container is specifically designed for the safe storage and containment of liquid, featuring a sumped (bunded) base for contained spillage and a suspended grated floor.

The strong profiled steel building is manufactured in galvanized steel for long life and features double locks on the easy access double doors for added security.

As with all TP Structures flat-pack products the Expandachem liquids store is great for siting in locations with limited access as all the components can be carried by hand.

The ExpandaChem is an ideal portable metal chemical store and is available in three different sizes:

Length: 2.3m or 3m or 4m
Width: 2.1m
Height: 2.2m (internal 1.978m)

Easy assembly in around an hour using only a socket set and screwdriver, no special skills are required. You can see how easy it is to assemble the ExpandaChem flat pack bunded storage container by looking at our easy to follow assembly instructions.

Each ExpandaChem flat pack unit has a suspended grated floor above a sump that safely collects leaked or spilled materials and the double doors afford excellent walk in access as well as feature a secure double locking system. This makes the ExpandaChem ideal for use as a portable metal chemical store or liquids store whatever the environment.

1,000 kg/m2 floor grate loading

Protective powder coated finish on the doors and bunded base sump: Colour Red RAL3000


The ALL NEW ExpandaChem flat pack storage container features some great new improvements, including:

  • Stainless steel hinges improve security and appearance.
  • The door and frame have increased steel thickness.
  • Stronger construction. ExpandaChem is constructed from high quality galvanised steel panels for greater strength and durability.
  • The edges on the roof have been replaced with specially designed die cast aluminium corners. This improves the appearance, strength, durability and protects the corners from knocks and potential damage whilst in use.

Once assembled the Expandachem flat pack bunded storage container can be lifted and moved by crane or forklift with a load on board

Individual flat pack ExpandaChem liquids store units can be linked together to form larger areas of storage space, side to side or end to end.

All parts of the flat pack ExpandaChem portable metal chemical store can be replaced in the unlikely event that they become damaged or misplaced during relocation.

Optional heavy duty shelving system

Expandastore sumped metal shelf Expandastore shelving arm Expandastore shelving uprightExpndastore storage binExpandastore cable / hose hook

Tried and tested shelving that will carry a heavy load, very fast and easy to install. Comprising uprights and snap-in arms with sumped metal shelves, Storage bins and cable/hose hooks.

See: How to fit Expandarange shelving

Expandachem Flat Pack Store Technical Details

Feature 2.3m 3m 4m
Finish Galvanised, with powder coated double-doors
Length, external 2346mm 3165mm 4165mm
Length, internal 2276mm 3006mm 4006mm
Width, external 2246mm
Width, internal 2086mm
Height, flat packed Approx 300mm, being reviewed
Height, assembled 2247mm
Sump 124kg 156kg 197kg
Grate (set) 137kg 184kg 246kg
Short side panel 27kg 27kg 27kg
Long side panel 30kg 40kg 48kg
Door panel 52kg 52kg 52kg
Roof 66kg 77kg 92kg
Corner post 4kg 4kg 4kg
Total Weight 482kg 594kg 732kg
Door width 1918mm
Sump capacity 680ltrs 904ltrs 1212ltrs


Expandachem Flat Pack Store Construction Components

The main construction elements of the flat pack Expandachem storage container are as follows:

  • Chassis, including sumped base
  • Floor grate – loading 1,000kg / m2
  • Side wall panels
  • Roof panel
  • Double-door panels featuring the newly improved double locking system
  • Fastening elements
  • Numerous optional extras


Sumped chassis base, with suspended floor grate. The floor has a standard 1000KG load capacity

Side Walls & Roof Panel

0.60mm box profile galvanized steel panels.   The panels have been strengthened with galvanised steel frame sections at the edges of each panel. The roof section of the hand-portable building has two integral gutters for effective rainwater dispersal to all four corners of the container.

Door Panels

0.60mm box profile galvanized steel panel, with powder coated finish. The 2 door panels panel are produced by a spot welding process.  The doors are mounted into the frame with galvanized hinges.  Complete with two 64mm Euro deadlocks with replaceable cylinders and a central roller catch. Double-Door width: 1900mm, hinged on the right and left, outward opening.

Fastening Elements

Four 12 mm diameter rods are used to connect the roof to the chassis. These also form lifting eyes for use with a crane.  Additional roof security bolts are supplied to prevent external access.


All components of the Expandachem are specially packed to ensure that they are not damaged during transportation, loading and unloading under normal circumstances.  The smallest transportation cube is achieved in this packing process.

Powder Coating

The doors and sump chassis are powder coated in RAL3000 (Red).


Units can be enlarged by the addition of further units.  A special linking kit is available to extend side to side or end to end.

Please Note:
This product is not designed to store flammable liquids. If you are in any doubt as to which type of materials you are able to store, and what type of unit you require to safely store them you should seek advice from your Health & Safety officer. It is the responsibility of the employer that storage units meet the minimum legal requirements.

Due to our continuous product development programme, we reserve the right to change the specifications without prior notice.

Expandachem flat pack store plans

Uses for the Flat Pack Portable Metal Chemical Store, Liquids Store:

Construction sites, Farm yards & parks, Local authorities, Highways, Military usage, Garages, Sport fields, Warehouses

The hand portable nature of the ExpandaChem flat pack bunded storage container makes it ideal for use in restricted locations, including city centres such as London, Birmingham, Manchester, Cardiff, Glasgow etc.

Available to purchase or on contract lease (subject to status) – supplied and delivered nationwide to mainland England, Scotland and Wales.

Units are delivered as part of a shared load on a 11m long rigid body truck with a crane arm so that it can self offload alongside the vehicle. Other delivery options may be available at additional cost.

Whilst the ExpandaChem is designed for easy DIY assembly we may be able to provide an assembly service in some areas of the country. Please contact us for more details if you think this is something you might be interested in.

The Expandachem is not designed to store flammable liquids. If you have in any doubts as to which type of materials you are able to store, and what type of unit you require to safely store them you should seek advice from your Health & Safety officer.