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SCT App A 1 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Structural Collapse Technician.

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Presentation on theme: "SCT App A 1 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Structural Collapse Technician."— Presentation transcript:

1 SCT App A 1 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Structural Collapse Technician Training Jan09 Appendix C: Metal Burn Cutting

2 SCT App A 2 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Unit Objectives the capabilities and limitations of all the types of metal burning that can be used in US&R operations The student will understand the capabilities and limitations of all the types of metal burning that can be used in US&R operations Understand how to efficiently and safely cut and remove multiple pieces of steel from a debris pile Understand how to efficiently and safely cut and remove multiple pieces of steel from a debris pile

3 SCT App A 3 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Enabling Objectives Discuss how to conduct a site hazard analysis Discuss how to conduct a site hazard analysis Select appropriate PPE Select appropriate PPE Select the most efficient metal burning equipment based on needs of an incident Select the most efficient metal burning equipment based on needs of an incident Discuss safety practices associated with the different metal burning equipment Discuss safety practices associated with the different metal burning equipment dentify hazardous situations found when cutting and burning on a debris pile Identify hazardous situations found when cutting and burning on a debris pile Understand the safety practices to minimize risk to rescuers. Understand the safety practices to minimize risk to rescuers.

4 SCT App A 4 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Enabling Objectives Discuss the use & setup of the various types of metal burning equipment based on safety, material type & thickness Discuss the use & setup of the various types of metal burning equipment based on safety, material type & thickness Identify special issues involved with Compressed gas cylinders Oxy / acetylene—use and safety Gasoline / oxygen operation Discuss proper breakdown, storage and shipping methods for the metal burning equipment in FEMA US&R Cache Discuss proper breakdown, storage and shipping methods for the metal burning equipment in FEMA US&R Cache

5 SCT App A 5 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Topics to be discussed Oxy/Fuel process & Safety Oxy/Fuel process & Safety Personal Protective Equipment Personal Protective Equipment Types of Metal Burning Equipment Types of Metal Burning Equipment Oxy/Acetylene Oxy/Acetylene Oxy/Gasoline Oxy/Gasoline Exothermic/Oxygen Lance Exothermic/Oxygen Lance Plasma Arc Plasma Arc Storage & shipping methods Storage & shipping methods

6 SCT App A 6 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy Fuel Process

7 SCT App A 7 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training General Safety Guidelines Metal burning requires strict compliance with all manufacturer’s safety guidelines Biggest causes of injury Burns from hot material or ultraviolet rays Breathing toxic materials Wear full PPE at ALL TIMES Wear UV rated eye protection Use proper respiratory protection Work in 2 person teams

8 SCT App A 8 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training General Safety Guidelines (cont.) Inspect all equipment prior to use for damage and leaks Have a fire extinguisher or small hose line available for spot fires Have a fire extinguisher or small hose line available for spot fires Hydrate often Hydrate often and while Consider the reaction of your actions before and while cutting a piece of steel or cable

9 SCT App A 9 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Be aware of heavy equipment and other people working above and below Have a safety person watch the area for fire and other hazards

10 SCT App A 10 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training The tender is the burner’s second set of eyes because the person burning is focused on the progress of the cut Two Person Team

11 SCT App A 11 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Personal Protective Equipment n addition to the Std US&R PPE In addition to the Std US&R PPE Shaded eye protection Shaded eye protection Leather gauntlet gloves Leather gauntlet gloves Respiratory protection ( Organic Vapor) Respiratory protection ( Organic Vapor)  Consider the PAPR The level of protection will be dependant on the Situation and type of Metal to be removed The level of protection will be dependant on the Situation and type of Metal to be removed

12 SCT App A 12 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training 4 different scenarios requiring PPE selection

13 SCT App A 13 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Personal Equipment Crescent wrench Crescent wrench Striker/spare flint Striker/spare flint Tool belt Tool belt Tip Cleaners Tip Cleaners Spare Tips Spare Tips Marking Paint Marking Paint Tape Measure Tape Measure Soapstone Soapstone

14 SCT App A 14 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy-Acetylene Most common Oxy-fuel Process

15 SCT App A 15 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy/Acetylene Advantages Commonly used in many industries Wide variety of accessory equipment Wide variety of accessory equipment Disadvantages Has wide flammable limits Limited by the withdrawal rate of 1/7 per hr Limited by the withdrawal rate of 1/7 per hr

16 SCT App A 16 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy-Acetylene - Safety Practices Do not operate Acetylene above 15 PSIG Do not operate Acetylene above 15 PSIG Do not withdraw more than 1/7 of the cylinder contents per hour Do not withdraw more than 1/7 of the cylinder contents per hour Do not drain all of Do not drain all of cylinder contents cylinder contents Keep components and Keep components and area clear of grease, oil and area clear of grease, oil and other oxidizers/flammables other oxidizers/flammables

17 SCT App A 17 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy-Acetylene - Safety Practices Always operate with cylinder secured in an upright position Always operate with cylinder secured in an upright position Do not operate without Flashback Arrestors and reverse flow check valves Do not operate without Flashback Arrestors and reverse flow check valves Always perform a Always perform a mechanical check for mechanical check for leaking components leaking components

18 SCT App A 18 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training A small Leak can create a BIG event This event was caused by a leaking 12 cubic ft. acetylene cylinder similar to what may be carried in your US&R cache

19 SCT App A 19 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy Acetylene Equipment Acetylene cylinder Must be stored & operated in upright position

20 SCT App A 20 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Acetylene Cylinder Compressed to a pressure of PSIG Unstable in a gas form if above 15 PSIG Open cylinder 1 to 1 ½ turns

21 SCT App A 21 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxygen Cylinder Compressed to a pressure of 2250 PSIG Compressed to a pressure of 2250 PSIG Must be secured at all times Must be secured at all times Must be capped in an upright position for transport or when not in use Must be capped in an upright position for transport or when not in use

22 SCT App A 22 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Alternative oxygen sources - Liquid Oxygen The Dewar can evaporate 4500 Cu. Ft. of gas from a liquid contained in cylinder The Dewar can evaporate 4500 Cu. Ft. of gas from a liquid contained in cylinder External evaporator may be needed External evaporator may be needed Must be kept in an upright position Must be kept in an upright position The Green compressed cylinder contains about 250 Cu. Ft. of Oxygen The Green compressed cylinder contains about 250 Cu. Ft. of Oxygen

23 SCT App A 23 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Liquid Oxygen - Dewar

24 SCT App A 24 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Compressed Oxygen Trailer Used when a large Demand is needed Used when a large Demand is needed A tube style Trailer Cannot be easily moved around a site A tube style Trailer Cannot be easily moved around a site May not be readily available May not be readily available

25 SCT App A 25 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy Acetylene Equipment Acetylene Regulator Oxygen Regulator Acetylene Regulator Oxygen Regulator Do not operate above 15 PSIG Regulates gas down to its working pressure Regulates gas down to its working pressure Stand off to side when opening cylinder Stand off to side when opening cylinder Regulator screw should be backed out and turn freely before opening cylinder Regulator screw should be backed out and turn freely before opening cylinder

26 SCT App A 26 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Flashback Arrestors Flashback Arrestor prevents a fire from burning back to the cylinder Check valves Check valve allows gas to flow in one direction A quick connect acts as a check valve

27 SCT App A 27 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Hoses are Color Coded Also threaded differently depending on application Oxygen is Green with Right-Hand threads Fuel Gas is Red with Left-Hand threads All fuel gas equipment has a groove on the fitting to indicate Left-Hand threads All fuel gas equipment has a groove on the fitting to indicate Left-Hand threads

28 SCT App A 28 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Hoses Get Abused in Debris Pile Are exposed to sharp edges, etc. Inspect for cracks/burns & other wear Make sure hoses are rated for the fuel and proper tip size Make sure hoses are rated for the fuel and proper tip size Keep clean from grease/oil & other oxidizers Keep clean from grease/oil & other oxidizers

29 SCT App A 29 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Torches Various lengths/styles and head angles Various lengths/styles and head angles Some are made for welding and have a cutting attachment Some are made for welding and have a cutting attachment The size of the tip not the torch length determines the thickness of the cut The size of the tip not the torch length determines the thickness of the cut

30 SCT App A 30 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Torch Tips

31 SCT App A 31 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Tip Selection Chart A 145 cu. ft. cylinder should not have a withdrawal rate of more than 21 SCFH Refer to the chart above for safe tip size

32 SCT App A 32 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy-Gasoline - Petrogen

33 SCT App A 33 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy-Gasoline - Petrogen Advantages: Advantages: Can cut steel that is up to 14 in. thick Can cut steel that is up to 14 in. thick Will cut through various sized air gaps Will cut through various sized air gaps Less likely to fuse itself back together Less likely to fuse itself back together Not limited by the fuel cylinder size Not limited by the fuel cylinder size

34 SCT App A 34 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxy-Gasoline - Petrogen Disadvantages: Disadvantages: Equipment is not available locally Equipment is not available locally Rescuers must understand that the Petrogen torch setup, tuning and usage is different than the oxy-acetylene setup Rescuers must understand that the Petrogen torch setup, tuning and usage is different than the oxy-acetylene setup Failing to understand the differences will produce poor cutting results Failing to understand the differences will produce poor cutting results

35 SCT App A 35 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Petrogen Safety Practices Always perform a check for leaks Always perform a check for leaks When checking for a fuel leak look for liquid fuel on the ground and couplings When checking for a fuel leak look for liquid fuel on the ground and couplings Secure fuel tank in the upright position Fuel cannot flow with tank on its side Secure fuel tank in the upright position Fuel cannot flow with tank on its side

36 SCT App A 36 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Petrogen Safety Practices A flashback arrestor should be used on the oxygen line. A flashback arrestor should be used on the oxygen line. One is not required for the fuel line One is not required for the fuel line Do not operate fuel tank below 10 psi Do not operate fuel tank below 10 psi

37 SCT App A 37 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Petrogen Equipment Fuel Tank Holds 2.5 gallons of fuel Holds 2.5 gallons of fuel Equal to a 250 cu.ft. acetylene cylinder Equal to a 250 cu.ft. acetylene cylinder Has a pressure relief on the filler cap Has a pressure relief on the filler cap Has a safety valve on the pressure gauge & fuel valve Has a safety valve on the pressure gauge & fuel valve Use the freshest fuel available Use the freshest fuel available

38 SCT App A 38 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Various lengths/styles and head angles Various lengths/styles and head angles The size of the tip not the torch length determines the thickness of the cut The size of the tip not the torch length determines the thickness of the cut Petrogen Equipment - Torches

39 SCT App A 39 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Petrogen Equipment Torch Tips Tip has two pieces Tip has two pieces Fuel enters the tip as a mist /atomized gasoline oxygen mixture Fuel enters the tip as a mist /atomized gasoline oxygen mixture Has oxygen and pre heat ports similar to Oxy- Acetylene Has oxygen and pre heat ports similar to Oxy- Acetylene If tuned properly, fuel entering tip should keep tip cool as it vaporizes If tuned properly, fuel entering tip should keep tip cool as it vaporizes

40 SCT App A 40 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Petrogen Equipment Tip Chart Serves as a basic starting point Serves as a basic starting point Settings will depend on operator experience Settings will depend on operator experience You are not limited by the 1/7 per hour rule You are not limited by the 1/7 per hour rule Tip does not need to be as clean a for oxy- acetylene tip Tip does not need to be as clean a for oxy- acetylene tip

41 SCT App A 41 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Petrogen Equipment A big advantage of the Petrogen is that is can be fully broken down and repaired in field with a spare parts kit.

42 SCT App A 42 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Petrogen Equipment - Poor Practice Operator Error caused this overheated equipment Operator Error caused this overheated equipment Typically caused by too close of a coupling distance or tuning the torch too lean Typically caused by too close of a coupling distance or tuning the torch too lean A coupling distance of ½” is a good safe starting point A coupling distance of ½” is a good safe starting point Heat transferred from Tip & overheated mixer

43 SCT App A 43 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Exothermic Torch Exothermic uses a consumable rod with oxygen pushing through the rod. Its primary Function is to melt the material

44 SCT App A 44 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Exothermic Torch Advantages Can burn through almost anything Disadvantages: Operator must wear full PPE Operator must wear full PPE Large spark showers of molten metal Area of work must be free of combustibles

45 SCT App A 45 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Oxygen Lance Uses exothermic technology but uses a much thicker and longer consumable rod Uses exothermic technology but uses a much thicker and longer consumable rod This allows the operator to be at a safer distance away from the material being cut This allows the operator to be at a safer distance away from the material being cut

46 SCT App A 46 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Plasma Arc Plasma Arc - Electric arc & Compressed air Advantages Can cut ferrous Can cut ferrous & non ferrous metal & non ferrous metal Burns clean Burns clean  Low slag & sparks Disadvantages: Systems that can burn thicker material are large + heavy Systems that can burn thicker material are large + heavy  Also require 220v to operate

47 SCT App A 47 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Basic Torch Handling Skills Make yourself as comfortable as possible Make yourself as comfortable as possible Try to work the torch like a pool cue or pivot using your hand or material/debris as a pivot point Try to work the torch like a pool cue or pivot using your hand or material/debris as a pivot point

48 SCT App A 48 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Estimating Steel Weight - Area Method Estimating Steel Weight - Area Method Steel weighs 490 lbs per cubic ft Steel 1” thick weighs 490pcf / 12” = 40.8 psf For steel weight per square foot use: 1” thick Use 40 lbs ¾” Use 30 lbs ½” Use 20 lbs ¼” Use 10 lbs 12” 1” 12”

49 SCT App A 49 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Area Method Examples 1 & 2 Flanges = 24”x 5” Web = 12”x 3.5 inches Web = 12”x 3.5 inches 36”x 2” Example 1 Example 2 12”x 2”

50 SCT App A 50 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Area Method Example - 1 What is weight of this 36ft long steel section? 2” Steel = 2 x 40 psf = 80 psf Area per ft = 2 x 3 sq ft + 2 x 1 sq ft = 8 sq ft Weight per ft = 8 x 80 = 640 plf Total weight = 640 x 36 = 23,040 lbs Exact weight = plf (only 2% off) Pl 36" x 2" Pl 12" x 2" ea end

51 SCT App A 51 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Area Method Example - 2 What is weight of this 20ft long steel section? 2 Flanges 40 psf x 5” x 2 ft x 2 = 800 plf Web 40psf x 3.5” = 140 Weight per ft = = 940 plf Total weight = 940 x 20 = 18,800 lbs Exact weight = plf (only 2% off) Pl 24" x 5" Pl 12" x 3.5”

52 SCT App A 52 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Area Method – Round Tube Shapes Get area by: Circumference x Length Either Measure distance around w/ tape or Multiply Diameter x 3 (exact is 3.14) Think - cut & unfold tube Weight per ft is 3 x Diameter x Wt, per sq ft

53 SCT App A 53 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Area Method - Pipe & Tube Example What is weight of this 16ft long steel pipe? 12” Diameter x ½” thick ½” Steel = 20 psf Area per ft = 3 x 1 = 3 sq ft Weight per ft = 3 sf x 20 = 60 plf, Total = 960 lb Exact weight = 61.4 plf (only 2% off) For Sq Tube use 4 x Size x Wt per sq ft For 8” Sq. x ¼” thick x 16ft (10psf for ¼”) Wt per ft = 4 x 8”/12”x 10psf = 26.7 plf, 427lb From AISC Hbk = 25.8 plf (only 4% off)

54 SCT App A 54 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Other clues for Steel Weight Numbers painted on steel at the Mill / Shop Numbers painted on steel at the Mill / Shop First number is Depth in Inches First number is Depth in Inches Second is Weight Per Foot in Pounds Second is Weight Per Foot in Pounds Third is Length in Feet Third is Length in Feet Usually located near the end Usually located near the end May be covered with other paint May be covered with other paint

55 SCT App A 55 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Shipping & Storage Methods All torches & hoses purged of combustible fuel All torches & hoses purged of combustible fuel Remove quick disconnects if used to completely remove fuel Remove quick disconnects if used to completely remove fuel Store Petrogen torches, hoses & fuel tanks in a ventilated shipping box Store Petrogen torches, hoses & fuel tanks in a ventilated shipping box Regulators are fragile and should be stored in protective oil free hard case Regulators are fragile and should be stored in protective oil free hard case Refer to IATA and local guidelines for shipping compressed gases Refer to IATA and local guidelines for shipping compressed gases Acetylene torches can be stored in a oil free hard case Acetylene torches can be stored in a oil free hard case

56 SCT App A 56 Structural Collapse Technician National Urban Search & Rescue Response System Structural Collapse Technician Training Review Unit Objectives the capabilities and limitations of all the types of metal burning that can be used in US&R operations The student will understand the capabilities and limitations of all the types of metal burning that can be used in US&R operations Understand how to efficiently and safely cut and remove multiple pieces of steel from a debris pile Understand how to efficiently and safely cut and remove multiple pieces of steel from a debris pile


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