Since very high standards prevail at the airport, only qualified and safety examined mechanics are allowed to work there. As Senft GmbH disposes of all the necessary admissions and safety test certificates, we were chosen to carry out this building project.

In the City Hall Centre of Bochum 3,000 t reinforced concrete ceilings, girders and columns were removed across 2 floors in order to create an atrium. Due to lack of time the works were carried out non-stop in day and night shifts.

Concrete sawing and demolition works in an enterprise located in Dortmund.
Shows flush sawing (here flush to the floor) among other things.

We had to saw reinforced concrete walls in the new port of Duisburg to the effect that our client would be able to discharge his loads more quickly from the ships arriving every day.

In Hamburg a 4 floors high air-raid shelter was converted into a residential and office building. We received the order for the concrete sawing works. Our task was to form openings in reinforced concrete walls in the dimensions 2.50 m x 3.50 up to 4.50 m x 5.00 m. The wall thicknesses were 1.10 m up to 1.20 m.

All services from a single source!
In an enterprise in Neuss 490 m² of an approx. 20 cm thick intermediate ceiling built of reinforced concrete were sawed up, dismantled and disposed of. In addition we dismantled 1,800 m² plasterboard partitions including insulation. Furthermore we removed 600 m² carpeted floor and hereafter ground all glue and carpet residues over the entire surface down to the concrete floor.

BUT Duisburg.
Here 200 linear metres of former ore bunker walls built of reinforced concrete with a thickness of up to 1 m were sawed off in a height of 8 m and at an inclination of 5°.

Alteration „Kleines Haus" at the Schauspielhaus Düsseldorf Gustaf-Gründgens-Platz l
Concrete sawing and demolition, PDF - reference letter of the architect regarding our work

Dismantling and disposal of strips of segmental panels containing asbestos from the interior of a cooling tower at Harzheim.

Project: Furniture store POCO at Dorsten, demolition of storage rooms, demolition works were completed, contaminated ground was excavated, filled back with RCL and compacted layer by layer.

Demolition of masonry and concrete in a church. All the window frames over the side wall of a church were dismantled, crushed and disposed of. Combination of drilling, sawing and demolition operations as well as disposal.

on a concrete floor in a factory workshop at Leer. Approx. 20 cm concrete was milled off.

Wire sawing works in the St. Johannes Hospital in Duisburg. Here foundations with a size of 1.80 m / 1.30 up to 2.20 / 1.80 m were cut by means of wire sawing (in order to avoid noise caused by large scale facilities during stemming operations). The time needed for cutting the approx. 35 m² surface was 2.5 days.

Residential complex in Osnabrück
120 balconies with a weight of 5.40 t each were professionally dismantled and disposed of using a merlo resp. a 100-tonne truck crane.
Furthermore 18 reinforced concrete canopies were dismantled, 1,000 linear metres fascia built of precast reinforced concrete units as well as 800 m² asbestos cement slabs were dismantled and also professionally disposed of.

At the Dorint Hotel in Cologne we demolished the swimming pool on the first floor under regular business and disposed thereof. The pool was situated directly above the lobby at the entrance. We had 10 working days to execute this building project. More than 250 t reinforced concrete had to be dismantled and disposed of using a concrete saw..

Execution of demolition, concrete drilling and sawing works to the bridges of the Metro business group. Special task to be carried out in the outside area. Within one day 4 balconies of 12 m length and 1.40 m width were sawn off and dismantled by means of a 100-tonne crane (up to a height of 17.90 m). In the entrance area the reinforced concrete portal with a weight of 100 t was professionally dismantled (sawed off and dismounted) within one day.

The complete shaft cover with a thickness of 0.67 m was horizontally cut off from a 12 m deep shaft with a 8.80 m Ø by means of a wire saw. The shaft cover was sawn up into 4 parts of 4.6 t each and dismantled using a truck-mounted crane. The wire saw was used because the shaft walls had a thickness of up to 0.90 m. The works were carried out within two days.

Here an underpass of the DB AG in Essen was cut off over the whole cross-section by means of a wire saw. The width of the masonry was 1.25 m, the concrete slab had a width of 30 cm.

Demolition of an office building in the city centre of Dortmund. Severe dust formation had to be suppressed using water. Demolition and removal of asbestos tainted floor covering.

Here a 2,000 m² concrete surface was milled off. An asphalt surface with a thickness of 2 cm was removed from the concrete surface, subsequently the milling material was gathered by a sweeping maching and disposed ofg as can be seen in the pictures.

Views of the hall immediately before its demolition

Demolition works in the hall of Daimler-Chrysler executed for the construction of a new brake test rig.

Demolition of 23 former colliery houses.
Use of water in order to suppress formation of dust.

Here a hall inside a hall was dismantled, its size was 15 x 10 m, its height approx. 8 m. The concrete slab was 35 cm thick. The whole hall had to be dismantled vibration-free and had to be disposed of. For these works we needed 5 working days and 4 skilled workers. In the pictures you can see the hall in its original state and during its demolition.

Demolition and disposal (incl. sorting of waste) of a staircase in Bochum, Bergmannsheil Hospital parallel to the ongoing business

Here 8 foundations weighing 35 t each were dismantled in front of the listed facade of an office building in Düsseldorf. The coordination was undertaken by us, these giant foundations could be loaded by us only during the night by means of heavy equipment. Several streets in Düsseldorf had to be closed,that is why the removal coulld be effected only during a night shift. The foundations were removed by us using the wire saw technique. We chose this technique because there were very strong reinforcement rods with diameters of 50 mm in the columns. The foundations had served to protect a 20 floor high building while this was being constructed.

Extensive concrete drilling and sawing works as well as concrete demolition works were executed.
A ramp made of reinforced concrete was sawn free at the lateral connections and hydraulically blasted asunder. The size of the ramp was 5.95 x 5.35 m up to a concrete thickness of 0.95 m. It took 3 days to do this and 3 skilled workers were needed to carry out these works incl. the removal of material from the second lower ground floor as well as 20 m³ soil.
The complete reinforcement over a surface of 20 m² and down to a depth of 0.30 m was exposed. Furthermore reinforced concrete and masonry were manually dismantled due to lack of space needed for big construction machinery.

Concrete cutting by means of an electric joint cutter. Here an action was performed which had to be completed within 2 days and 2 nights on a Saturday and a Sunday.
280 m² floor slabs with a thickness of 0.25 m were removed and disposed of. Due to emissions everything had to be sawn out very neatly, 290 linear metres saw cut and also 125 carottages were carried out, additionally 18 m³ reinforced concrete walls located underneath the floor slabs were sawn out and disposed of.

Dismantling of balconies belonging to houses in a residential estate incl. removal and disposal thereof.

Here a hall with a 13,800 m² floor was restored by us. Individual surfaces between 2,000 and 3,500 m² were milled. Here a 2,000 m² milled surface can be seen where an asphalt covering layer with a thickness of three to four cm was milled off the concrete floor.

Here 1,150 m² reinforced concrete slabs were dismantled up to a height of 7 m and disposed of. Furthermore major drilling and sawing works were carried out.

1,200 m² Eternit corrugated sheets containing asbestos had to be removed within 2 days. Duration of the works: 2 days, 3 skilled workers on site at Hattingen.

Dismantling of a 13 m long canopy by means of a guided wall saw and a lifting device. The saw cut had to be executed flush with the wall. For these works we needed half a working day and the customer was very satisfied.