Demanding reinforced concrete superstructure built rapidly, safely and efficiently up to a height of 63 m using PASCHAL.

The building contractor for the project, Implenia Bau GmbH of Baden-Württemberg, decided on the Climbing system 240 and the LOGO.3 formwork system on the basis of good service when the tender was prepared and the special climbing concept of the PASCHAL formwork technicians.

From the fire extinguishing water tank to the bearing floor panels, the underground garage construction to the last reinforced concrete slab of the hotel tower, the entire framework is a monolithic reinforced concrete structure.
Approximately 1,200 m² of the LOGO.3 formwork system, 100 linear metres of the climbing system 240 with suspending scaffold were used for building the structure.

The hotel tower is built up to a height of 63 m with PASCHAL’s climbing system 240.
The photograph shows the climbing system for the construction of the 8th floor.

Construction site situation in combination with the hotel tower required particular considerations

The 75m x 49m construction site is occupied almost entirely by the buildings, with shell dimensions of 68m x 48m.
Consequently, the PASCHAL engineering department was already involved in setting up the site in order to design the formwork units of climbing system 240 including the suspending scaffold on the basis of possible crane lifting loads.
Because the climbing platforms had to have a maximum size so that the formwork units could be lifted from one floor to the next with smallest number of crane lifts.
Two climbing scaffold sizes were used together to optimise crane lifts. Four approximately 6.00m long climbing platforms were therefore enough for each side of the tower. On the 3rd floor and above, the formwork and concrete work were carried out in two-week cycles. 220m³ of concrete and 40t of reinforced concrete were used for each hotel tower floor.
With the individual adaptations to the Lörrach hotel tower, climbing system 240cm once more proved its individual flexibility for economical construction.

Façade design with particularities for formwork planning

Two more challenges were brilliantly met by the PASCHAL formwork experts in the hotel tower. The anchoring system for the climbing platforms must not collide with the attachment points of the façade construction. The PASCHAL engineers consequently planned to make the anchoring points for the climbing brackets in the reinforced concrete slab level without exception and made the static calculations for them.
The heavily segmented façade with floor-to-ceiling openings and the changing floor layouts also had to be considered carefully in the formwork planning in order to transfer the horizontal forces safely to the remaining reinforced concrete wall and columns from the climbing scaffolds. To guarantee this, a special cross bar was built by PASCHAL to span the façade openings.

The bracing for the climbing scaffolds had to be planned for attachment exclusively in the slab levels due to the specifications for the fastening points of the façade constructing and the constantly changing window openings at the roof level.
This was also made possible including anchor dimensioning by the PASCHAL engineering department.

Seismic zone III and its requirements

The stairwells were concreted with wall thicknesses of up to 60 cm in C50/60 class concrete to brace the hotel tower safely. The dismantling inside corner posts were installed in combination with the LOGO.3 formwork system to build the important shear cores.
Lifting platforms in various sizes were installed by PASCHAL to ensure that subsequent work could be carried out safely.
The smallest lifting platform was 1.40m x 0.83m and the largest has dimensions of 3.80, x 3.64m. Ten lifting platforms with a total of 40m2 and 7 suspending scaffolds were used for building the high-rise construction.

Occupational safety facilities included

A wide range of safety facilities were also implemented in conjunction with the PASCHAL formwork systems: enclosures on the ladder ascents, the guardrail in the area of the stair landings and nets.

4 star hotel plus residential hotel

The new construction consisting of the hotel tower, the restaurant building and the residential hotel with 49 apartments stands opposite Lörrach main railway station. As the operators of an international hotel chain hope, the project will benefit from good infrastructure connections to the Swiss metropolis of Basel a few kilometres away.
The hotel is being built on behalf of the Lörrach client, Dr, Karl Helmut Eberle, according to plans by the architectural firm of Külby und Külby, Lörrach. KSP Jürgen Engel Architects of Berlin are responsible for the façade architecture.
The high-rise hotel including the ground floor has more than 20 floors in keeping with the zoning plan, with a base storey underneath it for the equipment rooms and the underground garage. Three waterproof concrete tanks for fire extinguisher water were built under part of the base storey floor surface. These concrete structures were clad using PASCHAL’s LOGO.3 formwork system.

Project data:

The dismantling insider corner posts were installed in combination with the LOGO.3 formwork system to build the important shear cores.

All safety facilities were also supplied by PASCHAL.

Visualisation of the hotel construction, seen from Belchenstraße.
The architectural firm KSP Jürgen Engel Architects of Berlin are responsible for the façade design of the hotel tower.

The architectural firm Külby und Külby in Lörrach is responsible for the overall design and approval plans and construction documentation. Close contact was maintained with PASCHAL formwork planning throughout the construction planning phase.

Source: Külby und Külby Architecture Firm