Demolition Techniques

Demolition Techniques
You may assume demolition is simply blowing things up. Some involve explosions but it is however way more technical than that. There are various demolition techniques that are considered as ‘demolition’.

 

It must be noted that before any demolition takes place the following practices need to be completed according to The Constructor

1. Surveying
2. Removal of hazardous materials
3. Preparation of plan
4. Safety measures

 

Taking the above into account the following (according to Civil Engineering News) are selected.

1. Non Engineering Demolition also known as Manual.

a) Refering to tools such as Sledge Hammers, Jack Hammers and Drillers which are used by workers.

Jackhammer - Demolition Techniques.jpg
Jackhammer Technique

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Engineering Demolition which is split into 3 categories.

a) Mechanical Method:

Wrecking Ball (think Miley Cyrus but without the theatrics)

Pusher Arm technique (a specialised hydraulic arm used for smaller buildings)

Thermic Lance Technique (using flaming temperatures of 2500 0C to melt reinforcement)

Non-Explosive (drilling and filling with expanding slurry)

Concrete Sawing

Deliberate Collapse (significant structural items are removed)

Pressure Jetting (thanks to H20)

 

b) Implosion: Inward disintegration using explosives

c) Deconstruction: Non-structural and structural

Wrecking Ball - Demolition Techniques.jpg
Wrecking Ball Technique

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Demolition encompasses many techniques and is often used in conjunction with new construction or renovation.

In conclusion, I’ll take inspiration from Rumi, ‘In this life many demolitions are actually renovations.’

 

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Industry Events: Key Principles of Tendering Workshop and Global Trade Show

Industry Events: Key Principles of Tendering Workshop and Global Trade Show

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Key Principles of Tendering: Workshop

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25 to 26 July 2018

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Johannesburg

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South Africa’s premier masterclass on how to submit compliant and winning tenders. This workshop has now been presented to more than 2,000 delegates and with the on-going changes in the tendering legislation companies are advised to continue to align, not only their bids but also their sub-contracting processes with these regulations.

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27 to 29 July 2018

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Industry Events: Affordable Housing Africa, Smart Procurement World Kwa-Zulu Natal Conference & Expo and Power Gen & DistribuTech Africa

Industry Events: Affordable Housing Africa, Smart Procurement World Kwa-Zulu Natal Conference & Expo and Power Gen & DistribuTech Africa

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Affordable Housing Africa

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16 to 18 July 2018

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Cape Town Marriott Hotel Crystal Towers, Cape Town

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Smart Procurement World Kwa-Zulu Natal Conference & Expo

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17 to 19 July 2018

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Durban ICC, Durban

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Industry Events: WoodEX for Africa, I Code Java Conference and International Conference on Transport Infrastructures

Industry Events: WoodEX for Africa, I Code Java Conference and International Conference on Transport Infrastructures

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WoodEX for Africa

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11 – 13 July 2018

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Gallagher Convention Centre, Johannesburg

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I Code Java Conference

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11 – 13 July 2018

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AstroTech Conference Centre, Johannesburg

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International Conference on Transport Infrastructures

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09 – 10 July 2018

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CSIR International Convention Centre, Pretoria

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The International Conference on Transport Infrastructures, organized by the international Society for Maintenance And Rehabilitation of Transport Infrastructures. The conference will cover areas like Southern African Transport, Transportation Infrastructure, Design Construction, Design Construction.

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Industry Events: Occupational Health and Safety Systems Short Course, ADI Expo, International Conference on Civil and Structural Engineering

Industry Events: Occupational Health and Safety Systems Short Course, ADI Expo, International Conference on Civil and Structural Engineering

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Occupational Health and Safety Systems Short Course

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7 July 2018

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Industry Events: WISA 2018, SASEC & Drones Conference

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WISA (Water Institute of Southern Africa’s Biennial Conference & Exhibition 2018)

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Industry Events: SAPICS Annual Conference 2018 and Africa Rail 2018

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SAPICS Annual Conference 2018

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Century City Conference Centre, Western Cape

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Industry Events: Frigair Exhibition 2018, Railway Infrastructure Maintenance Management and Bow Tie Analysis Master-Class

Industry Events: Industry Events: Frigair Exhibition 2018, Railway Infrastructure Maintenance Management and Bow Tie Analysis Master-Class

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Frigair Exhibition 2018

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6 – 8 June 2018

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Gallagher Convention Centre, Johannesburg

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FRIGAIR is Africa’s largest heating, energy, ventilation, air conditioning and refrigeration exhibition. Learn about the latest industry trends and technologies, especially around the industry’s crucial role in the rapid development of eco-friendly, energy efficient and sustainable technologies for the future.

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Short Course in Railway Infrastructure Maintenance Management

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4 – 8 June 2018

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Pretoria

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The Railway Infrastructure Maintenance Management short course will introduce you to the general principles of railway infrastructure maintenance and the management thereof, as applied to the fields of track, traction power supply, signalling and rail-bound, telecommunications, as well as its integration into a multidisciplinary approach.

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Bow Tie Analysis Master-Class Course

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6 – 8 June 2018

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Pretoria

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The Bow Tie Analysis MasterClass course explains a simplistic methodology to follow during the risk analysis process. It will deal in particular with the strategic relevance of the Bow Tie Analysis, setting up a scene to compare results from audits, accidents, incidents, monitoring activities for comparison of passive and active controls related to specific scenarios determined during the risk identification process.

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Industry Events: JBCC Suite of Contracts and Key Principles of Tendering Workshop

Industry Events: JBCC Suite of Contracts and Key Principles of Tendering Workshop

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JBCC Suite of Contracts

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28 – 29 May 2018

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Key Principles of Tendering Workshop

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1 June 2018

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Umhlanga, Durban

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L2B Blog: History of Hard Hats

.History of Hard Hats

History of Hard Hats

Hard Hats; a common symbol of the Construction Industry, but have you ever stopped to wonder about the History behind this safety accessory?

History

According to Prescot Valley Tribune, “The Hard Hat originated with Edward Bullard, a WWI veteran. He brought a steel helmet home after the war. This metal headgear was the inspiration to revolutionize industrial safety. Bullard’s father worked in the industrial safety business for 20 years and sold protective hats, but they were made of leather.

Construction of the Hoover Dam, which began in 1931 was the first project in which construction workers were required to wear Hard Hats. Later, in 1933, the construction site of the Golden Gate Bridge became America’s first “Hard Hat Area”.”

The first Hard Hats were made from:

  • Leather
  • Canvas
  • Steel
  • Aluminum
  • Fibreglass
  • Plastic
  • and finally today’s High-Density Polyethylene (HDPE).
Functionality

The function of the Hard Hat is pretty obvious. If worn and fitted correctly it provides limited safety from shock, perforation, fire, water and heat.

Hard Hats also provide a form of identification.

A wearer can use colour coded Hard Hats to differentiate between job titles/responsibilities:

  • White – Managers, Engineers, Supervisors/Foremen
  • Blue – Electricians, Carpenters and other technical operators (besides civil workers)
  • Green – Safety Officers
  • Red – Fire Fighters
  • Yellow – Labourers
  • Brown – Welders and workers with high heat application
  • Grey – Site Visitors

These colour codes are general and could change according to the Project.

Over time Hard Hats, like most things also need replacing. As a wearer, you should inspect your Hard Hats before each use.  Your support strap should also be replaced annually and the entire hat every five years. Hard Hats may also allow for the attachment of safety accessories; most noteworthy are face shields, respirators, hearing protection and work lamps.

Future

Today’s Hard Hat hasn’t changed much since the 1960’s and has become a staple of safety, but they may be getting an upgrade in the future.

According to Sourceable, “In Australia, RMIT has developed a system whereby sensors can be embedded onto safety glasses, helmets or boots and can monitor and inform workers of impending danger…”
Sounds really interesting, after all, technology is a part of our every day lives and why not safety too.
Industry leaders can achieve much by ‘upgrading’ the Hard Hat. For example, by monitoring and assessing stats you can take precautions; not only in the present but also in the future through behavior analysis. But this may also present issues; like how much monitoring is too much when it comes to privacy and tracking? What are your thoughts?

In conclusion, the future sure looks safe when it comes to Hard Hats. The History of Hard Hats was certainly an interesting topic to research and blog.

Finally

Do you have any Hard Hat stories or facts you’d like to share? Or do you frequently use one?

Sources

https://en.wikipedia.org/wiki/Hard_hat

https://www.pvtrib.com/news/2018/jan/26/ask-contractor-history-hat-protects-workers/

https://www.thenbs.com/knowledge/what-colours-are-safety-helmets-hard-hats-on-construction-sites

http://www.civilology.com/helmet-color-code-construction/

https://sourceable.net/smart-hard-hats-next-trend-construction-safety/

 

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