New England Roofing Industry Partnership Materials Handling, Rigging, & Cranes SUBPARTS H,N,O Materials Handling, Rigging & Cranes Training Objectives After completing this unit, you will: – Know the basic OSHA requirements for the storage and disposal of materials. – Know hazards in both mechanical and manual material handling. – Understand hazards of rigging and crane operations and how to minimize them. – Be aware of proper lifting techniques. 1 SUBPARTS H,N,O Materials Handling, Rigging & Cranes References 29 CFR 1926.250; Subpart H, Materials Handling, Storage, Use, and Disposal Subpart N – Cranes, Derricks, Hoists, Elevators, and Conveyors 29CFR1926.500, Subpart O – Motor Vehicles, Mechanized Equipment, and Marine Operations 29CFR1926.600, ANSI and ASME Standards 2 SUBPARTS H,N,O Materials Handling, Rigging & Cranes Materials Handling Dangers Unsafe storage and materials movement can lead to: – Back injuries (the number one cause of worker compensation claims). – Struck-by or crushed by falling loads due to rigging failures. – Electrocutions due to power line contact. – Injury from falling materials. – Injury from slipping, tripping and falling. 3 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Moving Materials by Hand: Back Facts 8 out of 10 Americans will have a back injury during their life. Approximately 1 out of 3 injuries at work are back injuries. Personal pain and inconvenience can not be measured. Back injuries cost employers an estimated 10 billion dollars each year! 4 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Preventing Back Injuries You can avoid back injuries by: – Using mechanical aids. – Using proper lifting techniques. – Keeping in lifting shape. – Working as a team when lifting. – Knowing the truth about back belts. 5 SUBPARTS H, N, O Materials Handling, Rigging & Cranes 6 Proper Lifting Technique Basic moves of a proper lift: – Plan your lift. – Use a wide-balanced stance. – Get close to the load and keep it close to your body. – Tighten your stomach muscles. – Keep your back straight and use your legs. – Turn with with your feet don’t twist your back. – Avoid lifting above shoulder height. SUBPARTS H, N, O Materials Handling, Rigging & Cranes A Proper Lift 7 SUBPART H,N,O Materials Handling, Rigging & Cranes Keeping in Lifting Shape Keeping your stomach and back muscles strong can help prevent back injuries. Even if you don’t work out in a gym, you can prevent back injuries. Strength and flexibility exercises should be done at least every other day. 8 SUBPARTS H, N, O Materials Handling, Rigging & Cranes For Strength and Flexibility 9 SUBPARTS H,N,O Materials Handling, Rigging & Cranes Mechanical Aids Use hand trucks, dollies, carts, wheel barrows, and wagons whenever possible. Encourage management to include mechanical aids whenever possible. 10 SUBPARTS H,N,O Materials Handling, Rigging & Cranes 11 Mechanical Aids Slab carrying rig here has eliminated bending over and has provided secure non-abrasive handholds. SUBPARTS H, N, O Materials Handling, Rigging & Cranes Team Lifting Use team lifting for: – Loads too heavy for one person. – Loads too bulky for one person. – Long loads such as pipes and rolls of material. Talk to your team-mate! Coordinate your lift! 12 SUBPARTS H, N, O Materials Handling, Rigging & Cranes What About Back Belts? The National Institute for Occupational Safety and Health (NIOSH) says: – Back belts may not reduce stress on the back. – May increase blood pressure and heart rate. – May make you think you can lift heavier loads with a belt on and you could get hurt trying to. If you want to wear a belt; don’t wear it too tight and don’t lift more than you usually would. 13 SUBPARTS H,N, O Materials Handling, Rigging & Cranes Material Storage Five basic rules for safe storage: – Keep total weight within the safe loading limits of the building’s floors. – Keep passageways clear. – Control materials so they do not slide, fall, or collapse. – Provide cribbing for heavy loads on unstable surfaces. – Store materials away from traffic. 14 SUBPARTS H,N,O Materials Handling, Rigging & Cranes What Does OSHA Require? Basic requirements: – Don’t put materials within 10 feet of roof edge. – Don’t store materials on scaffolds or runways. – Keep materials at least 6 feet from floor openings and hoistways. – Keep aisles clear. – Keep work area free from tripping, fire, explosion, pest and vegetation hazards. 15 SUBPARTS H,N,O Materials Handling, Rigging & Cranes OSHA Also Requires Specific requirements: – Stack bagged materials by stepping back the layers and cross-keying the bags at least every 10 bags high. – Stack bricks no higher than 7 feet. – Taper masonry blocks back one-half block per tier for stacks above 6 feet. – Stack lumber on sills and on level solid ground - never exceed 16 feet high and always remove nails! 16 SUBPARTS H,N,O Materials Handling, Rigging & Cranes Setting Materials on the Deck What could happen to these stacked materials? 17 SUBPARTS H,N,O Materials Handling, Rigging & Cranes Disposal of Waste Material OSHA requirements: – Scrap lumber, waste and trash must be regularly removed from the work area. – Burning must meet local regulations. – Materials dropped more than 20 feet require a chute. – Solvent waste, oily rags, and flammables must be kept in fire resistant containers until removed. – If the waste is considered hazardous, your employer will have to follow federal, state, and local regulations. 18 SUBPARTS H ,N, O Materials Handling, Rigging & Cranes Debris Chutes Objectives in using a chute: material control, dust control and protection of workers and bystanders – note the differences here…. 19 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Mechanical Materials Handling Depending on the job, you might use or work around: – Buggies – Roof Hoists – Conveyors – Skid-steers (“Bobcats”) – Rough Terrain Forklifts (“Lulls”) – Cranes 20 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Buggies What are the safety concerns while moving materials with these? 21 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Mechanical Equipment on Flat Roofs Will the deck support the weight of the equipment? Has the equipment been inspected? Are all equipment guards in place? Is the operator trained? – See Subpart C - .20(b)(4) Are all aware that the equipment is not to be operated outside warning lines due to the fall hazard? – See Subpart M - Fall Protection -.502 – Closest approach is 6 feet parallel and 10 feet perpendicular to direction of travel. 22 SUBPARTS H, N, O Materials Handling, Rigging & Cranes 23 Roof Hoists What are the manufacturer’s instructions for set up & use? What does OSHA say? SUBPARTS H, N, O Materials Handling, Rigging & Cranes Roof Hoist Safety Concerns .552(a)(1) Compliance with manufacturer’s specifications and limitations. .552(a)(2) Load capacity, hazard warnings and instructions must be posted. .552(a)(3)(i-iv) Wire rope replacement criteria. .552(a)(4) Hoist rope is to be installed in accordance with manufacturer’s instructions. .501(b)(3) Fall Protection (Subpart M) in hoist area. 24 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Is the Hoist Operator Protected? 25 SUBPARTS H, N, O Materials Handling, Rigging & Cranes 26 Using Conveyors to Move Materials SUBPART H, N, O Materials Handling, Rigging & Cranes Safety Concerns In Conveyor Use Set up and used in accordance with the manufacturer’s instructions? Guards Power in place on pinch points? line clearances maintained? Maintenance program in place? 27 SUBPART H, N, O Materials Handling, Rigging & Cranes 28 Safety Concerns In Conveyor Use No riders on conveyor! .555(a) Means for stopping motor at operator’s station and start up warning. .555(a)(5) Protection for workers below against falling objects. .555(a)(7) Lockout/Tagout for maintenance. SUBPART H, N, O Materials Handling, Rigging & Cranes 29 Using Conveyors to Move Materials Power line clearance? Back up alarm or signal person? Fall protection for roof workers? SUBPARTS H, N, O Materials Handling, Rigging & Cranes Using Skid Steers on the roof – will it take the load? Is the operator qualified? If – .20(b)(4) – Again! Training is available from some manufacturers. – Skid Steers are powerful, work in close quarters with people and are very quick, with large areas where the operator cannot see (the “no-zone”). Is the work area adequately barricaded? 30 SUBPARTS H, N, O Materials Handling, Rigging & Cranes 31 Skid Steer Loader What do we need to know about this operator? SUBPARTS H, N, O Materials Handling, Rigging & Cranes Operator sight distances from eye level to ground 32 The “NO-ZONE” 11’ 7” Eye level 5 ft 5 in above ground level 11’ 5” 21’ 8” 4’ 10” 6’ 1” 3’ 1” 6’ 3” Vehicle: S-44 Bobcat SUBPARTS H, N, O Materials Handling, Rigging & Cranes Using Forklifts to Move Materials What do we need to know? – Is the operator trained? • See .602(d) – Has the machine been inspected and properly maintained? – Is the backup alarm audible? – Are ground personnel protected? – Is the balanced load within capacity? – Are workers on roof protected from falls? 33 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Getting Materials to the Roof How can we protect against falls in these situations? 34 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Using Forklifts What precautions need to be taken around the machine’s operating area? 35 TS SUBPARTS H, N,N, O O Materials Handling, Rigging & Cranes Operator sight distances Eye level 7 ft - 3 in above from eye level to ground ground level 85’ 0” 18’ 2” 7’ 9” 10’ 9” 3’ 0” 39’ 0” The “NO-Zone” 21’ 2” 14’ 10” Vehicle: R-14793 High Reach Fork Lift 36 SUBPARTS H, N, O Materials Handling, Rigging & Cranes 37 Platforms on Forklifts If you work off of some attachment it must: (1) Be secured to forks. (2) Have a guardrail. (3) Have a Personal Fall Arrest System tie-off. (4) Used only while the operator is in the seat. SUBPARTS H, N, O Materials Handling, Rigging & Cranes Rigging and Crane Safety Rigging is the lines or cables used to lift and move materials by hoisting with a crane. A rigger is a skilled mechanic who prepares heavy equipment or loads of material for movement. 38 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Examples of Rigging 39 SUBPARTS H, N, O Materials Handling, Rigging & Cranes The Hazards of Rigging Possible contact with power lines. Rigging failures due to overloaded, improper, or defective rigging. Out of control loads. Being struck by the crane’s swing radius. 40 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Can Anyone Rig or Lift Loads? Rigging must be done under the supervision of a Competent Person. The crane operator must be highly qualified and certified. Improper rigging or unqualified operators can be deadly! 41 SUBPARTS H, N, O Materials Handling, Rigging & Cranes The Rigger’s Duties The rigger selects the rigging. The rigger sets-up the rigging. The rigger directs the lift. 42 SUBPARTS H, N, O Materials Handling, Rigging & Cranes 43 OSHA Rigging Requirements All slings and hardware must be manufactured to meet demanding specifications which include safety factors. All web or alloy chain slings must be clearly stamped, marked, or labeled, for capacity. OSHA prohibits job made: slings, hooks, links, and fasteners formed from bolts. Before each use all components must be inspected by a Competent Person. SUBPARTS H, N, O Materials Handling, Rigging & Cranes Safe Working Load (SWL) The maximum load allowed on rigging is the Safe Working Load (SWL). The sling may actually be able to hold 5 times the SWL. A safety factor is the ratio of the ultimate strength to the SWL. If a rigger exceeds the SWL, then they lose some of the safety factor. 44 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Knowing Safe Working Loads 45 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Sling Angle The safest sling angles are greater than 450 from the horizontal. 46 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Rigging the Load Sling angles <450, load unstable, worker not protected. Balanced load; sling angle >600 47 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Working Safely Around Rigging General safety practices: – Keep at least ten feet away from power lines up to 50 kV. – Increase power line clearance distance by .4” per kV >50kV – Never hoist loads over workers. – Never stand too close or under a load. – Never ride a load. 48 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Working Safely Around Rigging2 General safety practices: – Use tag lines to control loads while lifting. – Test lift the rigging. – Use proper equipment, make sure it is marked, not home-made, and in good shape. 49 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Crane Hand Signals Only a qualified rigger will give hand signals. 50 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Basic Crane Safety Do we have the right crane for the job? Is the operator qualified on that crane? Has the crane been inspected? Is the crane set up on solid ground? – Full outriggers with cribbing? – Level, with tires off the ground? Are power line clearances known? Do we know the weight of the load? Is everyone aware that a lift is being made? 51 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Basic Crane Safety2 Is the load properly rigged for a stable, vertical lift? Is there a high wind condition? Is the swing radius barricaded? Can a tagline be properly used? Can the crane make the lift and set the load without interference? 52 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Truck-Mounted Cranes/Boom Trucks 53 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Case Study: What went wrong? Two employees were moving structural steel building beams to a storage area. After setting the fourth beam on the crib, the signal man signaled the crane operator to pull the sling from around a cribbed structural beam which was set on its flange side. The second employee then attempted to remove the shackle from the beam when the swaged fitting of the sling apparently caught and caused the steel beam to roll off the cribbing, crushing the second employee. 54 SUBPARTS H, N,O Materials Handling, Rigging & Cranes Materials Handling (1926.250 - 252) Common OSHA Citations: .251(a)(1) Rigging equipment inspection and removal from service. .251(e)(8) Synthetic Web Slings – removal from service. .252(a) Exterior drop chutes .251(a)(4) Rigging capacity not marked – not prooftested. How can the hazards addressed by these Standards best be corrected, controlled, or eliminated? 55 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Review Questions True or False? 1. Back injuries are the number one cause of worker compensation claims. 2. Using proper lifting techniques, staying in shape, using mechanical aids, and team lifting are the best ways to avoid back injuries. 3. Using a back belt almost always prevents a back injury. 4. Anyone can hook-up a sling and be a rigger. 56 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Review Questions True or False? 5. Job-made slings, hooks, links, and fasteners formed from bolts are allowed if a Competent Person says so. 6. Proper knots are permitted in web-slings. 7. Slings should be inspected before each use and pulled from service if found defective. 8. The safest sling angles are less than 45 degrees from the horizontal. 57 SUBPARTS H, N, O Materials Handling, Rigging & Cranes Review Questions True or False? 9. Cranes and rigging must stay at least 10 feet from power lines. 10. Materials can be stored within 10 feet of the roof’s edge. 11. Materials dropped more than 20 feet require a chute. 12. Materials must be kept at least 2 feet from floor openings and hoistways. 58