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close this bookSoil Block Presses (GTZ, 1988, 38 p.)
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DSH hydraulic press

La Mecanique Regionale
23, rue de la Gare
F-51 140 Muizon
Tel. 26 02 95 75
Tlx. 306 022 lmr f

La Mecanique Regionale

The manufacturer of the DSH is a French firm which specializes in the production of mechanical and hydraulic equipment, as well as various innovative items that are outside the range of normal specifications.

Along with the supply of equipment, La Mecanique Regionale cooperates with a group of experts to provide a wide range of services: - Consultancy and expert analysis (including feasibility studies, soil analysis, block manufacture tests, etc.).

- Building design (architectural and engineering services, advice on most appropriate construction technique, detailing, etc.).

- Training courses (in earth construction techniques, manufacture of earth blocks, use, maintenance and repair of equipment, production management, site supervision, and other relevant issues).

The services can be provided in France or in the client's country, and the type and duration of services depend entirely on the client's requirements.


The DSH hydraulic press is a further development of the DSM manual press, designed to improve the production rate and mechanical characteristics of the blocks (by time-saving, simultaneous operations and higher pressure). The DSM and DSH presses were developed by C.T.B.I., a French firm that used to specialize in earth and wood construction.

The principal feature is the rotating table with three moulds, which successively move three times to complete one production cycle (that is, filling of the mould, compression of the soil, and finally, ejection of the block).

The machine is normally supplied with an electric motor, but it is also available with a diesel engine or as a manual press, without any form of motorization (for use in remote areas or places where power or fuel supplies are limited and expensive).

A base frame of hollow steel profiles is provided for easy transportation with a fork-lift but alternatively the DSH press can be mounted on a self carrying chassis equipped with two wheels, for better mobility on the site or for towing on roads.

Operating the DSH

A minimum of two workers is required to ensure an efficient and continuous production of earth blocks with the DSH machine, the main functions being the filling of the moulds, the turning of the rotating table, monitoring and adjusting of the pressure at the end of the compression cycle, and removal of the ejected blocks.

A work force of 3 to 6 people is needed to quarry, transport and prepare the soil mix, which is best heaped close to the press, in order to facilitate the filling of the moulds with a shovel. The ergonomically designed machine with the mould opening at about waist level enables the worker to assume the most convenient and least tiring working posture when filling the moulds.

By pulling the lever at the top of the press, the table turns 120°, bringing the filled mould into the compressing position. Compression begins automatically by two vertical stroke hydraulic jacks acting from above and below. The compression pressure is adjustable and compaction is completed in 12 to 13 seconds. Simultaneously, the next empty mould is filled with earth. When both operations are complete, the table is again turned 120° by pulling the lever.

At the third position, the compacted block is automatically ejected for convenient removal and stacking. Again the next empty mould is filled simultaneously, while the second block is being compacted and so on. Each cycle takes about 20 seconds, depending on the efficiency of the workers, so that the theoretical output for motor-driven machines is 180 blocks per hour Manually operated presses can produce about 130 blocks per hour (theoretical output).

Technical Details

Size of machine (length x width x height)

160 x 90 x 125 cm (63 x 36 x 50 in)

Weight of machine

500 kg

Size of crate for shipment

170 x 100 x 130 cm (67 x 40 x 52 in)

Weight of packed machine

560 kg

Standard block size (single mould)

30 x 15 x 12 cm (11.8 x 5.9 x 4.7 in)

Maximum nominal compaction force

15 tonnes

Nominal compaction pressure

3.3 N/mm² (475 p.s.i.)

Compression ratio (adjustable)

between 1.5: 1 and 1.64: 1

Energy input/transmission


No. of blocks per cycle/output rate

1 / 130 blocks per hour

Labour force required (incl. excavation and mixing)

6 - 8 men

Price (ex works)

DSH (with electric motor)

75000 FF (approx. 12900 US$)

valid June 1988

DSH (with diesel engine)

85000 FF (approx. 14600 US$)

DSH (manual)

50000 FF (approx. 8600 US$)

FF = French Francs

Packing for shipment

3000 FF (approx. 520 US$)