SPS 334.60 Note
Note: Industry certification as an operating engineer is recommended.
SPS 334.60 History
History: Cr.
Register, January, 1994, No. 457, eff. 2-1-94.
SPS 334.61(1)
(1)
Application. This section applies to movable platforms that are raised and lowered from the structure.
SPS 334.61(2)(a)(a) Hoisting of the platform shall be performed in a slow, controlled, cautious manner with no sudden movements of the platform.
SPS 334.61(2)(b)
(b) Load and boom hoist drum brakes, swing brakes and locking devices such as pawls or dogs shall be engaged when the occupied platform is in a stationary working position.
SPS 334.61(2)(c)
(c) Portable towers shall be uniformly level within one percent of level grade and located on firm footing. Portable towers shall be equipped with outriggers. The outriggers shall be fully deployed following manufacturer's specifications when hoisting.
SPS 334.61(2)(d)
(d) The total weight of the loaded platform and related rigging shall not exceed 50 percent of the rated load capacity for the radius and configuration of the portable tower.
SPS 334.61(2)(e)
(e) The use of a machine having a boom in which lowering is controlled by a brake without aid from other devices which slow the lowering speed is prohibited.
SPS 334.61 Note
Note: This type of prohibited boom is commonly called a live boom.
SPS 334.61(3)(a)(a) Portable towers with variable angle booms shall be equipped with a boom angle indicator, readily visible to the operator.
SPS 334.61(3)(b)
(b) A positive-acting device, such as an anti-two-blocking device, shall be used to prevent contact between the load block or overhaul ball and the boom tip, or a system shall be used to deactivate the hoisting action before damage occurs in the event of a two-blocking situation.
SPS 334.61(3)(c)
(c) The load-line hoist drum shall have a controlled-load lowering system or device on the power train, other than the load hoist brake, which regulates the lowering rate of speed of the hoist mechanism. Free fall is prohibited.
SPS 334.61(4)(a)(a) The hoisting mechanism shall be equipped with a dual cable suspension system. The platform and dual suspension system shall be designed by a qualified engineer or a qualified person competent in structural design.
SPS 334.61(4)(b)
(b) The dual cable suspension system shall be designed to minimize tipping of the platform due to movement of persons occupying the platform.
SPS 334.61(5)(a)(a) If a wire rope bridle is used to connect the platform to the load line, each bridle leg shall be connected to a master link or shackle to ensure that the load is evenly divided among the bridle legs.
SPS 334.61(5)(b)
(b) Hooks on overhaul ball assemblies, lower load blocks or other attachment assemblies shall be of a type that can be closed and locked, eliminating the hook throat opening, except that an alloy anchor type shackle with a bolt, nut and retaining pin may be used.
SPS 334.61(5)(c)
(c) Wire rope, shackles, rings, master links and other rigging hardware shall be capable of supporting at least 5 times the maximum intended load applied or transmitted to that component. Where rotation resistant rope is used, the rope and hardware shall be capable of supporting without failure at least 10 times the maximum intended load.
SPS 334.61(5)(d)
(d) All eyes in the wire rope slings shall be fabricated with thimbles.
SPS 334.61(5)(e)
(e) Bridles and associated rigging for attaching the platform to the hoist line shall be used only for that purpose.
SPS 334.61(6)(a)(a) A trial lift with the unoccupied platform loaded at least to the anticipated liftweight shall be made from ground level, or any other location where persons will enter the platform, to each location at which the platform is to be hoisted and positioned. The trial lift shall be performed immediately prior to placing personnel on the platform. The operator shall determine that all systems, controls and safety devices are activated and functioning properly, that no interferences exist, and that all configurations necessary to reach each location will allow the operator to remain under the 50 percent limit of the hoist's rated load capacity. A single trial lift may be performed at one time for all locations that are to be reached from a single set up position.
SPS 334.61(6)(b)
(b) The trial lift shall be repeated daily, or when the portable tower is moved and set up in a new location or returned to a previously used location.
SPS 334.61(6)(d)
(d) The hoisting system shall be inspected if the load rope is slack to ensure all ropes are properly seated on drums and in sheaves.
SPS 334.61(6)(e)
(e) A visual inspection of the portable tower, rigging, platform and the tower base support or ground shall be conducted by a person designated by the jump master immediately after the trial lift to determine whether the testing has exposed any defect or produced any adverse effect upon any component or structure.
SPS 334.61(6)(f)
(f) Any defects found during inspections which create a safety hazard shall be corrected before hoisting personnel.
SPS 334.61(6)(g)
(g) Documentation of the trial lift and daily pre-operational lift shall be made available to the department.
SPS 334.61(7)(a)(a) Persons shall keep all parts of the body inside the platform during raising, lowering and positioning.
SPS 334.61(7)(b)
(b) Tag lines shall be used unless their use creates an unsafe condition.
SPS 334.61(7)(c)
(c) The portable tower operator shall remain at the controls at all times when the tower engine is running and the platform is occupied.
SPS 334.61 History
History: Cr.
Register, January, 1994, No. 457, eff. 2-1-94.
SPS 334.62(1)
(1)
Maximum g-force. The maximum G-force allowable on a jumper using waist and chest harness shall be 4.5 G's. The maximum G-force allowable on a jumper using an ankle harness shall be 3.5 G's.
SPS 334.62(2)
(2) Factor of safety. The minimum factor of safety for any bungee cord configuration attached to a jumper shall be no less than 5.
SPS 334.62 Note
Note: A factor of safety of no less than 5 means that the maximum dynamic load possible for a jumper to exert on a bungee cord configuration is no greater than 20 percent of that cord configuration's minimum breaking strength.
SPS 334.62(3)
(3) Bungee cord design. The owners of bungee jumping facilities shall use bungee cords that meet the following specifications:
SPS 334.62(3)(a)
(a) In a single bungee cord system, the binding shall hold the cord threads in the designed positions. The binding shall have the same characteristics as the cord itself. In a multiple bungee cord system, the cord shall be bound together to prevent potential jumper entanglement. The bindings shall not damage or affect the performance of the bungee cords.
SPS 334.62(3)(b)
(b) All bungee cords shall be designed and tested to perform within the prescribed limits of the maximum G-force and factor of safety specified in
subs. (1) and
(2).
SPS 334.62(3)(c)
(c) Conclusive ultimate tensile strength testing shall be performed on a representative amount of all manufactured bungee cords. All tests shall be performed or supervised by an independent certified testing authority or an independent certified engineer. Test results shall be made available to purchasers of the bungee cords and the department upon request. The testing authority shall determine the ultimate tensile strength of each test specimen and use the lowest failure value recorded as the ultimate tensile strength value for the corresponding lot of bungee cords tested. The ultimate tensile strength is reached when the applied load reaches a maximum before failure.
SPS 334.62(3)(d)
(d) A load versus elongation curve resulting from the test specified in
par. (c) shall be used to calculate the maximum G-force and factor of safety of the corresponding lot of bungee cords tested. The test results shall be made available to purchasers or users of the bungee cords and the department upon request.
SPS 334.62(3)(e)
(e) Owners shall follow the inspection and testing recommendations set forth by the bungee cord manufacturer or distributor. These tests shall be completed utilizing the maximum load the bungee cords are designated for.
SPS 334.62(3)(f)
(f) Owners shall obtain specifications on the maximum allowable usage of bungee cords expressed in number of jumps.
SPS 334.62(4)
(4) Cord material and sheathing. The bungee cord material and sheathing to be used shall be clearly specified in the site operating manual.
SPS 334.62(5)
(5) When to destroy cord. The bungee cord owner shall destroy the bungee cord and its non-metallic connectors when one of the following conditions occur:
SPS 334.62(5)(a)
(a) Exposure to daylight exceeds 250 hours, unless the bungee cord cover of the sleeve fully protects all of the cord from visible and ultra-violet exposure;
SPS 334.62(5)(c)
(c) Bungee cord threads exhibit wear, such as bunched threads or uneven tension between threads or thread bands;
SPS 334.62(5)(e)
(e) A bungee cord has had contact with solvents, corrosives or abrasives;
SPS 334.62(5)(g)
(g) When the dynamic load capacity becomes less than the maximum designed dynamic load;
SPS 334.62 Note
Note: As the bungee cord stretches over the course of its jump life, the dynamic load required to extend the bungee to 4 times its unloaded length will reduce.
SPS 334.62(5)(h)
(h) After a bungee cord has been used a maximum of 500 jumps; or
SPS 334.62(5)(i)
(i) When the bungee cord or its connectors do not comply with the manufacturer's specifications.
SPS 334.62(6)
(6) Cord records. Owners of bungee jumping facilities shall have a system for recording the number of jumps on each individual bungee cord in use.
SPS 334.62(7)
(7) Bungee cord destruction. Bungee cords retired from use shall be destroyed by cutting the cord into 5-foot lengths.
SPS 334.62(8)
(8) Bungee cord end connections. Bungee cord end connections shall have a minimum safety factor of 5 times the maximum dynamic load for that cord configuration. All end connections shall be of a size and shape to allow easy attachment to the jump harness and to the rigging. On multiple bungee cord systems, each cord shall have its own independent end connection.
SPS 334.62(9)
(9) Cord inspection. Bungee cords shall be examined daily. Before starting the day's operations, the jump master shall visually inspect the entire length and circumference of the bungee cord for signs of wear. The inspection shall be repeated at least 4 times during daily operation and recorded in the site log.
SPS 334.62 Note
Note: The performance criteria and system requirements contained in this section are for 2 types of bungee cords: Cotton or nylon sheathed cords and synthetic or natural rubber cords. Cotton or nylon sheathed bungee cords, called “preloaded" style cords, are rubber cords originally developed for military use. These cords are made in conformance with military specifications and are often referred to as “Mil. Spec." However, some nonmilitary specification cords currently in use meet the specifications contained in this section and are considered an approved variation. Synthetic or natural rubber bungee cords, called “New Zealand" style cords, are made with continuous loops of strands of natural or synthetic rubber.
SPS 334.62 History
History: Cr.
Register, January, 1994, No. 457, eff. 2-1-94.
SPS 334.63(1)
(1)
General. A jump harness shall be either a full body harness, a sit harness with shoulder straps, or an ankle harness.
SPS 334.63(2)(a)1.
1. Full-body-designed either as a full body harness or a waist harness worn in conjunction with a chest harness; or
SPS 334.63(2)(a)2.
2. Ankle-designed either as an ankle harness or an ankle strapping that is tied off to secure the jumper to the bungee cord end connection. The ankle harness or strapping shall provide evidence of redundancy. A link to a waist harness or “swami belt" shall be required. A harness shall not cause bruising.
SPS 334.63(2)(b)
(b) Harnesses shall be available to fit the range of jumper sizes accepted for jumping.
SPS 334.63(2)(c)
(c) The harness shall have a minimum breaking strength of 4000 pounds, be suitable for the type of jumping conducted and be manufactured by an organization approved to manufacture similar harnesses.
SPS 334.63(3)
(3) Harness inspection. All harnesses shall be inspected by the jump master prior to harnessing a jumper. Harnesses shall be removed from service when they exhibit signs of excessive wear, have been damaged, or when they have met the manufacturer's maximum usage allowance expressed in number of days or in number of jumps. A system shall be developed for recording the number of days or jumps.
SPS 334.63 History
History: Cr.
Register, January, 1994, No. 457, eff. 2-1-94.
SPS 334.64
SPS 334.64 Ropes. All ropes for holding or lowering the jumper shall have a minimum breaking strength of at least 6,000 pounds.
SPS 334.64 History
History: Cr.
Register, January, 1994, No. 457, eff. 2-1-94.
SPS 334.65(1)
(1)
General. All hardware and equipment used for the purpose of bungee jumping shall be approved for that purpose by the original manufacturer.
SPS 334.65(2)
(2) Carabiners. Carabiners shall be the screw gate type, manufactured of hardened steel, with a minimum breaking strength of at least 6,000 pounds.
SPS 334.65(3)
(3) Pulleys and shackles. Pulleys and shackles shall be manufactured of hardened steel and shall have a minimum breaking strength of at least 6,000 pounds. All pulleys shall be compatible with the rope size.
SPS 334.65(4)
(4) Webbing. Webbing shall be flat or tubular mountaineering webbing or equivalent with a minimum breaking strength of at least 6,000 pounds. If military specification bungee cords are used, all webbing shall have redundant connections.
SPS 334.65(5)(a)(a) There shall be 2 anchors that attach the bungee cord to the structure. Each shall have a minimum breaking strength of at least 8,000 pounds or shall be designed with a factor of safety of 5, whichever is greater. There shall be a carabiner that attaches each anchor to the bungee cord end. The 2 carabiners shall not be connected to each other.
SPS 334.65(5)(b)
(b) Where wire rope is used, it shall have swaged ends with a thimble eye or be continuous. Other connection systems are acceptable if they meet the strength specifications in
par. (a). Wire clips are not acceptable.
