Learning Objectives Understand the process of construction demolition using explosives. Describe the exclusion zone in an explosive demolition process.

1. Dammam Community College
Safety Technology Program
Construction Safety Training
SHORT COURSE
Instructor: Mr. Muizz Anibire, MSc
Tel: +966501296203, Email: muizzanibire10@gmail.com

2.  Understand the process of construction demolition using
explosives.
 Describe the exclusion zone in an explosive demolition
process.
Learning objectives

3. Demolition using explosives
Source: https://www.bigrentz.com/

4. Demolition using explosives
Source: https://www.bigrentz.com/

5. Demolition using explosives
Source: https://www.bigrentz.com/

6. Demolition using explosives
At 381 feet tall, the 1972-built AfE Tower became the tallest building to
ever be demolished using explosives when it came down in Frankfurt,
Germany, in 2014. The 50,000-ton skyscraper in the heart of the city
attracted over 10,000 onlookers on explosion day, and a wall up to 20 feet
high ran around the site to help stop any potential flying debris. (Ref:
https://www.popularmechanics.com/technology/infrastructure/g2978/7-of-
the-biggest-controlled-demolitions/)

7. Demolition using explosives
 If the demolition is to use explosives, an exclusion zone must
be established at a distance from and surrounding the structure
to be demolished.
 All persons with the possible exception of the shotfirer must
be outside the exclusion zone at the time of the explosion.
 An exclusion zone comprises four areas:
1. the plan area of the structure to be demolished
2. the designed drop area where the bulk of the structure is
designed to drop
3. the predicted debris area which is beyond the design drop
area and where the rest of the debris is predicted to drop
4. the buffer area between the predicted debris area and the
boundary of the exclusion zone.

8. Demolition using explosives
 The size of the exclusion zone is not just related to the height
of the structure – other issues must be considered such as the
effect of ground vibration on buried services.
 The main factors that influence the design of an exclusion
zone include:
o the designed collapse mechanism
o the materials used in the structure
o the condition of the structure
o the extent of any planned pre-weakening
o the types of explosives to be used
o the topography of the site
o the proximity of surrounding structures
o any adverse effects of ground vibration or the attendant
shock wave
o Noise and dust.

9. Demolition using explosives

10. Demolition using explosives

11. End of Session 08: