68
X1
Category 1: Buildings
Software: Frilo Statics, GLASER -isb cad-, Scia Engineer
Construction of a New Student Dining Hall - Haßloch, Pfalz, Germany
Stipulations
The objective was to construct a joint yet separate
building made of reinforced concrete, timber and
brickwork, with the entire building to be divided into a
hall and a food preparation area.
Specifications
The hall functions as the actual dining hall where
the food is distributed to the students. In order to
accomplish this, a widely spanned timber construction
of laminated timber trusses was chosen for the roof. In
the front area, reinforced concrete panels on steel posts
are used as supports for the laminated timber trusses.
In the rear area, a stable and rigid core of reinforced
concrete was constructed for bracing purposes. It also
contains all the technical facilities. The structure is
shifted and arranged in an offset pattern in the floor plan
as well as in the elevation. Altogether, there are five
adjacent buildings, which, although they differ in height,
dimension and inclination, have been united to form one
single hall. Adjoining the rear part of the hall, the food
preparation area is built in the conventional way, while
the individual houses are shifted and arranged in an
offset pattern as well.
Basic dimensions
• Length: 35.00 m
• Minimum width: 35.50 m
• Maximum width: 38.00 m
• Minimum height: 2.70 m
• Maximum height: 10.20 m
• Roof pitches: 12.5°, 15°, 20°, 55°
Programmes used
• Scia Engineer
• Frilo Statics
• GLASER -isb cad-
Structural calculation
To realise the structural system, the whole building was
modelled in Scia Engineer in 3D. This process enabled
the determination of the various intersection points of
walls, ceilings and roof constructions. As almost no wall
is parallel to its adjacent wall, and the roof constructions
have different pitches, too, all the resulting intersection
points had to be described and recorded exactly. This
was the prerequisite for construction planning. Detailed
modelling of the whole system in 3D provided the basis
for the complex formwork and reinforcement drawings.
By using Frilo along with Scia and GLASER -isb cad-,
this project was successfully planned and concluded.
Thoughts on the building
Starting with the strip foundations and the 25 cm
thick floor plate that runs at two levels, the reinforced
concrete disks that are 50 cm thick were initially erected
on the 50 cm x 50 cm stanchions at the start of the
construction site. Through the roof construction that
is inclined and reduces the load, as it is horizontally
made of laminated timber trusses, these disks and
stanchions had to be supported with sufficient rigidness
to be able to greatly limit deformations and to ensure
usability. Following this, the rigid reinforced concrete
section with walls that are 40 cm thick and ceilings
that are 30 cm thick rose towards the sky from the
centre of the base plate. It was possible to achieve
a high level of rigidity due to the thicknesses used in
order to realise the rigid core on the one hand, and to
be able to withstand the seismic loads placed upon
the entire system on the other. Right from the start, all
the openings of the entire technology had to be jointly
taken into account for this reinforced concrete structure.
This could only be achieved through the extremely
good cooperation between the heating planner, the
ventilation planner, the designer of the sanitary facilities,
the electric planner and ourselves. The preparatory
building was constructed in a solid brick construction in
the rear section with a slight time delay. In this process,
reinforced concrete ceilings that are 30 cm thick were
placed on lime-sand bricks which joined with the
reinforced concrete core in terms of their incline and
orientation. Finally, the hall had a crown placed upon
it, using the laminated timber trusses that are 24 cm x
56 cm thick. These were placed upon them by means
of a frictional coupling on steel mounting parts that we
specially developed and set in concrete for this purpose.
