14.10.2010 Walter Werner, past president of DA 11

Demolition in Germany

A case study and update on demolitions developments in

Germany

14.10.2010 Walter Werner, past president of DA 21

Demolition in Germany

• Contents:

– Demolition industry in Germany and the German Demolition Association

– waste handling current state – technical trends

• machines• explosives

14.10.2010 Walter Werner, past president of DA 31

Demolition in Germany

Figures: total members of DA %

number of companies ~ 1600 ~ 420 26 %

number of employees ~ 10200 ~ 7200 71 %

salaries in mio € ~ 236 ~ 167 71 %

turnover in mio € ~ 1050 ~ 735 70 %

company size: 2 – 250 employees

most 15 – 20 employees

14.10.2010 Walter Werner, past president of DA 41

Demolition in Germany

• Figures:

• Demolition rubble 50 mio t– recycled 31 mio t = 61.5 %– plaster based waste 0.3 mio t = 0.2 %– other construction waste 1.9 mio t

14.10.2010 Walter Werner, past president of DA 51

Demolition in Germany

• waste management

- European frame guideline of waste management - not yet transformed totally into German law

- is expected for mid of 2011 - Electronic proof of waste management - is law, but the computers do not yet work everywhere

parallel paper and electronic registration = duplicated effort (= cost)

- Decree of replacement of materials (recycling) - in development → open ended - because of federal structure up to 16 different regulations

- decree about ground water must be modified

14.10.2010 Walter Werner, past president of DA 61

Demolition in Germany

• Technical trends

• machines: as in other countries: butwe are still missing a ultra high reach hydraulic rig ( maximum now: 43 m)

- operating license in preparation start expected 2011

EDA guideline will be considered

14.10.2010 Walter Werner, past president of DA 71

Demoition in Germany

Dragline

a 90 m boom is working

capacity: up to 6 t

complete hydraulic

pipe system installed

~ 250 t

14.10.2010 Walter Werner, past president of DA 81

Demolition in Germany

Explosives

new trend: use of

electronic detonators

even for breaking up

massive structures

like air raid shelters

14.10.2010 Walter Werner, past president of DA 91

Demolition in Germany

air raid shelter in the city of Lübeck ,North Germany

14.10.2010 Walter Werner, past president of DA 101

Demolition in Germany

“peeling” off 2/3 of the reinforced wall by blasting,

rest demolished with concrete crusher

14.10.2010 Walter Werner, past president of DA 111

Demolition in Germany

• Vibrations

German Standard DIN 4150

part 1: prediction/prognosis of vibrations

part 2: comfort criteria: effects on persons in buildings

part 3: effects on buildings/constructions

14.10.2010 Walter Werner, past president of DA 121

Demolition

Vibrations:

effects on persons in buildings: could become a problem

effects on buildings: low limits, but standard

in many European countries

solution: install a vibration monitoring

instrument → costs money, but saves a lot of trouble