demolition safety prestressed concrete structures

Demolition Safety - Pre-stressed Concrete Structures ...

Demolition of Pre-stressed Concrete Structures. The different forms of construction used in a number of more or less conventional structures built during the last few decades will give rise to a variety of problems when the time comes for them to be

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Section V: Chapter 1 - Occupational Safety and Health ...

B. Demolition of Prestressed Concrete Structures. The different forms of construction used in a number of more or less conventional structures built during the last few decades will give rise to a variety of problems when the time comes for them to be demolished. Prestressed concrete structures fall in this general category.

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OSHA Safety Training Demolition - Red Vector

Prestressed concrete structures fall in this general category. There are four main categories of prestressed members. The category or categories should be determined before attempting demolition, bearing in mind that any prestressed structure may contain

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(PDF) Demolition of Concrete Structures tcm45-341335 ...

If wall stability is Prestressed Concrete safety of workers and the general questionable, demolition should Demolishing prestressed con- public. continue down to the nearest struc- crete structures can be more diffi- tural cross member, or temporary cult than demolishing reinforced Safety checklist shoring should be erected.

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DEMOLITION OF PRESTRESSED CONCRETE STRUCTURES

the removal of any composite concrete covering to tops and ends of the units. 4. Lifting the units from the structure should generally be done from points near the ends of the units or from lifting point positions. Reuse of lifting eyes, if in good condition, is recommended whenever possible. Groups of “T Beams” Single Prestressed Slabs 5.

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An alternative technique to the demolition of a ...

Jun 01, 2017  The demolition of prestressed concrete structures is hazardous and the experience of most industries is still limited. Professional advice must be obtained from a suitably experienced registered engineer. A demolition plan or method statement is required.

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DEMOLITION SAFETY - United States Navy

DEMOLITION SAFETY STRUCTURES BUILT PRIOR TO 1980 MOST LIKELY WILL HAVE ASBESTOS AND LEAD BASE PAINT PRESENT . ... PRESTRESSED CONCRETE MEMBERS ARE LOCATED See Page #4 5 for Information about Pre-stressed Concrete! NAVFAC MIDLANT DEMOLITION SAFETY No wall section over 6 ft. permitted to stand without lateral bracing !

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Section V: Chapter 1 - Occupational Safety and Health ...

B. Demolition of Prestressed Concrete Structures. The different forms of construction used in a number of more or less conventional structures built during the last few decades will give rise to a variety of problems when the time comes for them to be demolished. Prestressed concrete structures fall in this general category.

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DEMOLITION AND REMOVAL OF EXISTING PRESTRESSED CONCRETE ...

It is suggested that prestressed concrete structures be classified into three groups, reflecting the complexity of the structure and the information required for its safe demolition. For the more complicated structures, it is recommended that demolition drawings and a detailed demolition sequence should be prepared and closely supervised by an ...

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DEMOLITION SAFETY - United States Navy

DEMOLITION SAFETY STRUCTURES BUILT PRIOR TO 1980 MOST LIKELY WILL HAVE ASBESTOS AND LEAD BASE PAINT PRESENT . ... PRESTRESSED CONCRETE MEMBERS ARE LOCATED See Page #4 5 for Information about Pre-stressed Concrete! NAVFAC MIDLANT DEMOLITION SAFETY No wall section over 6 ft. permitted to stand without lateral bracing !

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Demolition Techniques for Concrete Structures SpringerLink

It is concluded that more research into the use of explosives and bursting techniques for partial demolition of both reinforced and prestressed concrete members could lead to considerable savings in time and reductions in demolition costs.

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Demolishing of concrete structures - SlideShare

May 01, 2018  12-Apr-18 DEMOLITION OF PRESTRESSED CONCRETE After the shoring is in place, the tendon and reinforcing bars a re located using magnetic detection devices. Once this is done, careful drilling, chipping or sawing may be used to expose the pre stressing tendons (Photo B). The concrete can then be bro k e n with either hand-held or machine mounted ...

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Prestressed Concrete Structure - an overview ...

The main difficulty in assessing the condition of prestressed concrete structures is that failure of the prestressed members may occur as a sudden collapse without any visible warning signs. An example is the Ynys y Gwas bridge in Great Britain. It collapsed in 1985 after 32 years in service as a result of tendon corrosion, a short time after a regular visual inspection in which no evidence ...

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CODE OF PRACTICE - Buildings Department

5.2.2 Classification of Prestressed Concrete Structures 95 . 5.2.3 Precautionary Site Measures 96 . 5.2.4 Demolition Procedures 97. 5.3 Statically Determinate Structures 101 . 5.3.1 General 101. 5.3.2 Cantilevered Structures 102 . 5.3.3 Hinged or Pin-Jointed Trusses 102. 5.4 Composite Structures and Steel Structures 103

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CONSTRUCTION OPERATIONS - Oregon Occupational

Before the start of every demolition job, the demolition contractor should take a number of steps to safeguard the health and safety of workers at the job site. These preparatory operations involve the overall planning of the demolition job, including the methods to be used to bring the structure

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SPECIFICATIONS FOR DEMOLITION AND REMOVAL OF

DEMOLITION AND REMOVAL OF EXISTING STRUCTURES 1.0 DESCRIPTION The Work shall consist of: .1 Demolition, removal and disposal of existing concrete or steel structures, including but not limited to abutments, piers, girders, deck, curbs (in whole or in part); ... If the safety of the structure

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Demolition Safety - OSHAcademy free online training

However, demolition also poses additional hazards due to unknown factors such as: deviations from the structure's original design, approved or unapproved modifications that altered the original design, materials hidden within structural members, and unknown strengths

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Demolition and removal of existing prestressed concrete ...

Jul 07, 2015  Source: Structural detailing in concrete, 1 Jan 2003 (186–214) 11 Prestressed steel–concrete composite bridges Source: Steel–concrete composite bridges , 1 Jan 2005 (145–154)

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Decommissioning offshore concrete platforms

Olsen (Norway): Removal Offshore Concrete Structures This study concludes that theoretically it should be possible to refloat modern Condeep structures built after about 1990 where: the structures have been designed and constructed for removal to modern standards and reballasting and other safety-critical systems are in good condition.

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Demolition - Approved Code of Practice for

4.6 Concrete structures 23 4.7 Special buildings 23 4.8 Demolition plan (method statement) 23 5. SAFETY PRECAUTIONS DURING DEMOLITION 24 5.1 General 24 5.2 Earthquakes, wind and vibration 24 5.3 Supervision 24 5.4 Plant, tools and equipment 24 5.5 Personal protective equipment (PPE) 25

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07Sep90 UK: SPECIAL REPORT ON DEMOLITION - HOW PRESTRESSED

Sep 06, 1990  Safety can only be ensured if the client, engineer and contractor fully recognise the dangers and work together in the planning and supervision of the demolition of pre-stressed concrete ...

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Section V: Chapter 1 - Occupational Safety and Health ...

B. Demolition of Prestressed Concrete Structures. The different forms of construction used in a number of more or less conventional structures built during the last few decades will give rise to a variety of problems when the time comes for them to be demolished. Prestressed concrete structures fall in this general category.

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DEMOLITION SAFETY - United States Navy

DEMOLITION SAFETY STRUCTURES BUILT PRIOR TO 1980 MOST LIKELY WILL HAVE ASBESTOS AND LEAD BASE PAINT PRESENT . ... PRESTRESSED CONCRETE MEMBERS ARE LOCATED See Page #4 5 for Information about Pre-stressed Concrete! NAVFAC MIDLANT DEMOLITION SAFETY No wall section over 6 ft. permitted to stand without lateral bracing !

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Alternative Concrete Demolition Techniques Concrete ...

Mar 30, 2012  Every contractor needs to have a demolition section in their safety program. A couple of good resources for this are the National Demolition Association (NDA) and the Concrete Sawing Drilling Association (CSDA). The NDA, for example, has a series of safety talks including number XLVII on prestressed and post-tensioned concrete.

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CSA S350 - Code of Practice for Safety in Demolition of ...

Demolition procedures for both systematic and rapid progressive failure methods are described. Particular emphasis is given to areas of known concern. Recommendations are made for techniques of demolition for specific structural elements and types of structures, including prestressed concrete. (See Appendix A.)

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Demolition Safety - OSHAcademy free online training

However, demolition also poses additional hazards due to unknown factors such as: deviations from the structure's original design, approved or unapproved modifications that altered the original design, materials hidden within structural members, and unknown strengths

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SPECIFICATIONS FOR DEMOLITION AND REMOVAL OF

DEMOLITION AND REMOVAL OF EXISTING STRUCTURES 1.0 DESCRIPTION The Work shall consist of: .1 Demolition, removal and disposal of existing concrete or steel structures, including but not limited to abutments, piers, girders, deck, curbs (in whole or in part); ... If the safety of the structure

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Safe work with precast concrete WorkSafe

Nov 13, 2018  The guidelines do not cover detailed design of the completed structure, individual components used in the manufacture, handling and erection of precast concrete elements, or dismantling and demolishing precast concrete structures. Risks to health and safety come from people being exposed to hazards (sources of harm). These guidelines:

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AS 2601-2001 The demolition of structures

CAVILL B.A., Demolition of prestressed concrete structures. VSL Prestressing (Aust) Pty Ltd, Sydney, 1988. NHMRC Approved Occupational Health Guides NOHSC 7019 National Guideline for Occupational Health and Safety for the Operation of Load Shifting Equipment and Other Types of Specified Equipment Welding Institute of Australia — Technical ...

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Demolition - Approved Code of Practice for

4.6 Concrete structures 23 4.7 Special buildings 23 4.8 Demolition plan (method statement) 23 5. SAFETY PRECAUTIONS DURING DEMOLITION 24 5.1 General 24 5.2 Earthquakes, wind and vibration 24 5.3 Supervision 24 5.4 Plant, tools and equipment 24 5.5 Personal protective equipment (PPE) 25

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Controlled Demolition - Nitrex Explosives Engineering

The demolition became necessary to replace the old car-riageways with a new one in COR-TEN steel (about half the weight of reinforced concrete, higher seismic resistance, re-duced need of maintenance, and longer shelf life). All the spans were damaged, with cracks, loss of concrete volume, exposed re-bars, corrosion, and rupture. Less relevant dam-

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POST TENSIONING IN BUILDING STRUCTURES

Spectacular growth in the use of prestressed concrete took place after the Second World War with the material used to repair and reconstruct bridges in Europe. It is now an accepted Civil Engineering construction material. The A.C.I. Committee on Prestressed Concrete gives one of the most apt descriptions of post tensioned concrete.

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DURABILITY AND REPAIR ISSUES FOR PRESTRESSED CONCRETE ...

Nov 13, 2017  The use of Prestressed Concrete for construction of bridge, wharf and other civil structures expanded rapidly from the 1960’s onwards, due mainly to the increased spans and economy that it provided. The prestressed elements have also proved to be very durable, due mainly to the high quality of construction including good concrete cover ...

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(PDF) 4. ME Civil Structure Sumit Thakur - Academia

Prestressed Concrete tanks: General features, Analysis and design of circular tanks. Reference Books 1. T.Y. Lin Ned H. Burns – Design of Prestressed Concrete Structures, John Wiley Publication 2. N. Krishna Raju – Prestressed Concrete, Tata Mc Graw Hill Publication Co 3. Edward Nawy – Prestressed Concrete – A Fundamental Approach ...

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SPECIFICATIONS FOR THE DEMOLITION PROCEDURE

5.03 Mechanical demolition will be achieved by Jack Hammering, drilling and other mechanical means of non-load bearing and non-prestressed concrete where necessary. Rope pulling of brick walls will also be used. Mechanical machinery will be used to completely demolish the

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