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Material Handling in Shipyards and Marine Manufacturing (OSHA 1915)

A shipyard moves steel plate, prefabricated hull blocks, propellers, propulsion shafts, anchors, and chain through an outdoor, over-water, salt-laden workplace, and the rigging and hoisting that do it are governed by their own OSHA part, 29 CFR 1915 Subpart G, rather than the general-industry rules. UTEC Industrial designs, engineers, machines, fabricates, and installs custom material handling systems for aerospace and heavy industry from its Spokane Valley, WA facility, integrating Allen-Bradley PLC and motion control with in-house CNC machining, heat treating, and stress relief. This article works through the shipyard's and marine plant's handling problems in order: what makes the loads different, what Subpart G requires of gear, rigging, cranes, and operators, how rigging fails in practice, how the marine environment attacks handling equipment, and what the sensing and controls on engineered handling equipment add. Any handling system for this work is built along one chain, design → engineering → parts machining → fabrication → assembly → weld fatigue → stress relief → drives → controls → tuning → monitoring, and the corrosion, rigging, and control decisions made at the first links decide how the equipment behaves at the last.

What makes material handling in a shipyard different from other heavy industry?​

A shipyard's loads are large, irregular, and often lifted in the open, over water, or onto a moving vessel. Plate is handled on and off hulls, prefabricated hull blocks are rigged and turned before erection, and propulsion components such as propellers, shafts, and rudders are handled in drydocks and on fitting-out berths. The handling problem is also a scheduling problem. Shen, Lee, Jeong, and Woo describe the hull block erection network process, performed at the master production planning stage, as frequently delayed because of limited resources, limited workspace, and the block preparation ratio. Their discrete-event simulation of the erection process predicts delay against the block erection schedule from the variability of the block preparation ratio in a limited-resource environment.

In practical terms, the cranes, transporters, and rigging crews that lift blocks are a shared, constrained resource, so each late or re-rigged lift pushes the rest of the erection sequence. A handling system that shortens rigging time, avoids re-rigging, or keeps a block from waiting on a crane contributes directly to the erection schedule. Those constraints set the design brief for shipyard handling equipment:

  • Loads are one-off or low-volume shapes, not standard units, so pickup points are often welded pad eyes or lugs rather than built-in features.
  • Much of the work happens outdoors, near deck edges and open water, where a dropped or swinging load has few places to go.
  • Several trades work under and around the lift at once, so the struck-by and caught-between zones are crowded.

The study names limited resources and workspace, together with block readiness, as the causes of erection delay (Shen et al. 2021, Journal of Ship Production and Design 37-2, abstract).

Which OSHA rules govern rigging and materials handling in a shipyard?​

Shipyard employment has its own OSHA part. Gear and equipment for rigging and materials handling sit in 29 CFR Part 1915, Subpart G, which runs from §1915.111 to §1915.120:

  • §1915.111 Inspection of all rigging and materials-handling gear
  • §1915.112 Ropes, chains, and slings, covering manila rope, wire rope, and chain
  • §1915.113 Shackles and hooks
  • §1915.114 Chain falls and pull-lifts
  • §1915.115 Hoisting and hauling equipment, including derricks, cranes used on vessels, and marine railways
  • §1915.116 Use of gear, the rigging practice rules
  • §1915.117 Qualifications of operators
  • §1915.118 Tables, including Table G-1 for wire rope clips and Table G-2 for maximum allowable chain wear
  • §1915.120 Powered industrial truck operator training, whose requirements for shipyard employment are identical to those in 29 CFR 1910.178(l)

OSHA's shipyard eTool organizes its materials-handling guidance under the same six topics, inspection, ropes, chains and slings, shackles and hooks, chain falls and pull-lifts, hoisting and hauling equipment, and use of gear, and names equipment failure, improper use of equipment, and being caught between or struck by loads or rigging gear as the sources of serious injury. Several of these sections split by type of work: §1915.116(c) and (d) apply to ship repairing and shipbuilding only, and the rest of §1915.116 also applies to shipbreaking (OSHA 29 CFR Part 1915, Subpart G-2026, §1915.111 to §1915.120; OSHA eTool: Shipyard Employment, Materials Handling).

What must be inspected on shipyard rigging gear, and how often?​

Subpart G sets a daily floor and then adds intervals for specific gear. Under §1915.111(a), all gear and equipment the employer provides for rigging and materials handling must be inspected before each shift and, when necessary, at intervals during its use, and defective gear must be removed and repaired or replaced before further use. Under §1915.111(b), the safe working load of gear specified in §1915.112 and §1915.113 must not be exceeded.

Chain carries the most detailed schedule. Under §1915.112(c):

  • All sling chains, including end fastenings, get a visual inspection before being used on the job, paragraph (c)(2).
  • A thorough inspection of all chains in use is made every 3 months, and each chain bears an indication of the month in which it was thoroughly inspected; the thorough inspection covers wear, defective welds, deformation, and increase in length or stretch, paragraph (c)(2).
  • A chain sling is removed from service when stretch increases the length of a measured section by more than 5 percent, when a link is bent, twisted, or otherwise damaged, or when raised scarfs or defective welds appear, paragraph (c)(4).
  • Interlink wear is checked against Table G-2 in §1915.118, and the chain is removed when the maximum allowable wear at any point of a link is reached, paragraph (c)(3).
  • A repaired chain is proof tested to the manufacturer's recommended proof test load before it returns to service, paragraph (c)(5).

Chain falls and pull-lifts are regularly inspected under §1915.114(b), with attention to the lift chain, pinion, sheaves, and hooks on a chain fall, and to the ratchet, pawl, chain, and hooks on a pull-lift. Hooks are inspected periodically under §1915.113(b)(3) to confirm they have not been bent by overloading, and bent or sprung hooks may not be used. OSHA's rigging guidance for shipyards adds that a periodic inspection program does not eliminate the need to check rigging gear for damage before each and every use (OSHA 29 CFR Part 1915, Subpart G-2026, §1915.111 to §1915.114; OSHA Working in the Shipyard Industry: Rigging 2011, pp. C-6 and C-15).

How must slings, chains, shackles, and hooks be rated and marked?​

Every sling family in Subpart G carries the same marking rule. Manila rope slings under §1915.112(a), wire rope slings under §1915.112(b), and chain slings under §1915.112(c) must each have permanently affixed and legible identification markings, as prescribed by the manufacturer, that indicate the recommended safe working load for the types of hitch used, the angle on which it is based, and the number of legs if more than one. Each must not be loaded beyond that marked load and must not be used without the markings. Shackles carry the same marking requirement under §1915.113(a).

The rest of the gear rules close off common field shortcuts:

  • Hooks. Under §1915.113(b)(1), the manufacturer's recommendations govern hook safe working loads. A hook with no applicable manufacturer's recommendation must be tested to twice the intended safe working load before initial use, with a certification record kept showing the test date, the signature of the person who performed it, and an identifier for the hook. Loads go in the throat of the hook, because loading the point overstresses and bends or springs it, paragraph (b)(2).
  • Wire rope. Protruding strand ends in splices are covered or blunted, U-bolt clip eyes follow Table G-1 in §1915.118 with the "U" on the dead end of the rope, and wire rope is never secured by knots, §1915.112(b)(2) to (b)(4).
  • Chain. A load is never lifted on a kinked or knotted chain, and chain is never shortened by bolting, wiring, or knotting, §1915.112(c)(7). Wrought iron chain in constant use is annealed or normalized at intervals not exceeding six months when the manufacturer recommends it, and alloy chain is never annealed, §1915.112(c)(6).
  • Chain falls. Chain falls and pull-lifts are clearly marked with their capacity, §1915.114(a), and the strap, shackle, and overhead structure they hang from must support the load plus the gear, with the upper hook moused or otherwise secured, §1915.114(c). Scaffolding is not an attachment point unless it is designed for that purpose, §1915.114(d).

For a marine plant specifying below-the-hook tooling, these rules mean every hook, shackle, and sling it supplies arrives marked, rated for its hitch, and documented (OSHA 29 CFR Part 1915, Subpart G-2026, §1915.112 to §1915.114).

How are hull plates and hull blocks rigged for a lift?​

Plate and block lifts depend on attachment points that are often welded on for the lift. Under §1915.116(c), which applies to ship repairing and shipbuilding, plates are handled on and off hulls with shackles whenever possible. When there are no holes in the plate, clips or pads of ample size are welded on to receive the shackle pins. Only when holes or pads are impossible may alligator tongs, grab clamps, or screw clamps be used, and then special precautions keep employees from under the lift.

The use-of-gear rules then govern the rig itself:

  • Loads are safely rigged before being hoisted, §1915.116(b).
  • Slings on eye-bolts are arranged, using spreaders if necessary, so the pull is within 20 degrees of the axis of the bolt, §1915.116(e).
  • Slings are padded with wood blocks or other suitable material where they pass over sharp edges or corners, §1915.116(f).
  • Tag lines are provided on loads likely to swing or need guidance, §1915.116(d).
  • Loose ends of idle sling legs are hung on the hook, §1915.116(h).

OSHA's shipyard rigging guidance adds practice for welded pad eyes: each pad eye should be designed for its specific use and able to hold the intended force once welded in place; it should be welded solidly all around, middle of both sides first and then both ends; and the fitting tools pulled against it, such as come-alongs, chain falls, and turnbuckles, should be used at up to 80 percent of their capacity. The same guidance records a hull section being turned from horizontal to vertical by a two-crane lift, during which the unit shifted while a shackle was being assembled on its lifting lug and crushed a helper's foot. A block-turning fixture or engineered lifting frame replaces some of that re-rigging with a defined load path (OSHA 29 CFR Part 1915, Subpart G-2026, §1915.116; OSHA Working in the Shipyard Industry: Rigging 2011, pp. C-8 and C-22).

Where does shipyard rigging fail in practice?​

OSHA's shipyard rigging guidance documents a series of fatal and serious accidents, and each points to a design or planning input rather than bad luck:

  • Undersized gear on a heavy load. A crew rigged a 29-ton anchor chain, in ten 90-ft coils, to a 40-ton gantry crane with a 5/8 in cable to move it from a drydock to a barge. One cable snapped over the barge, and the falling coil killed a worker who was boarding. The guidance calls for reviewing both the type and the load capacity of the equipment so the lift keeps a safety margin.
  • Unequal chain falls. A ship repair crew lifted a 0.5 in thick, 8 × 40 ft patch plate with two 3-ton chain falls and one 1-ton chain fall. When an interior pad eye failed, the plate dropped and crushed a welder. The guidance calls for chain falls of the same capacity, pad eyes sized for their use and fully welded rather than tack welded, and blocking or shoring under the load while work is done.
  • Disabled safety devices. A newly assigned crane operator silenced alarms he did not understand; with the anti-two-block disconnected, the headache ball broke free and fell on the rigger below.
  • Swing radius. A rigger standing inside a portable crane's counterweight swing radius was fatally crushed when the crane swung; there was no barricade to keep workers out of the swing radius, which §1915.115(d) requires to be guarded.
  • Unsecured loads. A 3-ton exhaust stack leaned against another fell on a rigger, and a 16-ton anchor standing on a barge fell on a worker laying out its chain.

The recurring causes are gear that was not matched to the load, a hazard zone that was not physically closed off, and a safety device that could be switched off. Each is a documented failure mode, and each is easier to prevent in the handling equipment's design than in the procedure (OSHA Working in the Shipyard Industry: Rigging 2011, pp. C-16, C-18, C-20, C-21 and C-24; OSHA 29 CFR Part 1915, Subpart G-2026, §1915.115 paragraph d).

What rules apply to cranes, derricks, and marine railways in a shipyard?​

Section 1915.115 covers hoisting and hauling equipment. Its requirements are short, but each one sets a design feature:

  • Certification. Derricks and cranes that are part of, or regularly placed aboard, barges, other vessels, or the wingwalls of floating drydocks, and that transfer materials or equipment to or from a vessel or drydock, are tested and certificated under Part 1919 by accredited persons, paragraph (a)(1).
  • Guarding. The moving parts of hoisting and hauling equipment are guarded, paragraph (b).
  • Mobile cranes on a vessel. The manufacturer's rated safe working loads for the boom's working radii, and the maximum and minimum radii with and without outriggers, are posted near the controls where the operator can see them; a radius indicator is provided; and the posted loads are not exceeded, paragraph (c).
  • Swing radius. Accessible areas within the swing radius of the outermost part of a revolving derrick or crane body, permanent or temporary, are guarded so that an employee cannot be struck or caught between the crane and fixed parts of the vessel or the crane, paragraph (d).
  • Marine railways. The cradle or carriage on a marine railway is positively blocked or secured in the hauled position so it cannot be accidentally released, paragraph (e)(1).

OSHA's rigging guidance adds site conditions the crane depends on: the surface under a crane should be level within 1 percent grade and firm enough to support the crane and load, and equipment should not be operated within 10 ft of an energized power line. Its case histories include a rigger killed when a crane contacted low-hanging electrical wires on an alternate travel route that no one had re-assessed (OSHA 29 CFR Part 1915, Subpart G-2026, §1915.115; OSHA Working in the Shipyard Industry: Rigging 2011, pp. C-6 and C-12).

Who may operate shipyard hoisting equipment and signal a lift?​

Subpart G ties operation to competence and communication rather than to a license. Under §1915.117(b), only employees who understand the signs, notices, and operating instructions, and are familiar with the signal code in use, may operate a crane, winch, or other power-operated hoisting apparatus. Paragraph (c) bars any employee known to have defective uncorrected eyesight or hearing, or an ailment that may cause sudden incapacity, from operating that equipment, and paragraph (d) bars minors under 18 from operating power-driven hoisting apparatus or assisting by hooking on, loading slings, or rigging gear in ship repairing and shipbuilding. When ship's gear is used to hoist materials aboard, paragraph (a) requires a competent person to confirm the gear is properly rigged, in safe condition, and not overloaded by the lift.

Signalling rules follow in §1915.116:

  • A person familiar with the signal code acts as signalman when the hoist operator cannot see the load, and signals are clear visual or auditory signals; verbal signals are not permitted, paragraph (l).
  • Clear and sufficient advance warning is given to employees nearby before loads or empty lifting gear are raised, lowered, or swung, paragraph (p).
  • No one rides the hook or the load, loads are not swung or suspended over employees' heads, and no one stands between a swinging load and a fixed object, paragraphs (i), (j), and (q).

Powered industrial truck operators in shipyards are trained to requirements identical to 29 CFR 1910.178(l), under §1915.120 (OSHA 29 CFR Part 1915, Subpart G-2026, §1915.116, §1915.117 and §1915.120).

How does shipyard ergonomics push work onto engineered handling equipment?​

Much shipyard handling is still manual, and the injury record shows it. The NIOSH Shipyard Ergonomics Project, reported by Hudock and Reed, worked with eight shipyards and videotaped and analyzed more than forty specific job tasks for sustained or awkward postures, repetition, excessive force, and vibration, using the revised NIOSH lifting equation, the Rapid Upper Limb Assessment, and a 3-D static strength prediction program. The project reported 2001 injury and illness rates of 17.2 per 100 full-time employees in shipbuilding, against 7.9 in construction and 5.7 across all private industry.

Among the limited number of interventions installed, the project cites lift tables to reduce manual material handling in shop and drydock areas, and reports that interventions, where implemented, were extremely successful in reducing exposure to risk factors and usually increased productivity as well. The practical reading for a marine plant is that the same parts that crews lift, turn, and hold by hand, such as pipe spools, small plate, fittings, and outfitting components, are candidates for lift tables, positioners, and powered conveyors. A three-fold difference in injury rate against all private industry is a strong argument for putting those moves on equipment with defined capacities and interlocks (Hudock and Reed 2003, NIOSH Shipyard Ergonomics Project).

How does the marine environment attack handling equipment?​

Handling equipment in a shipyard or on a waterfront works in seawater splash and marine atmosphere, and corrosion is a design input from the first sketch. The ASM Handbook, Volume 13C, treats corrosion in marine environments as its own subject, covering seawater and marine-atmosphere corrosion, the metallic and organic coatings used to protect steel, and cathodic protection. Its marine-atmosphere chapter names the local environment as the single most important factor in marine-atmospheric corrosion, and assesses moisture, temperature, winds, airborne contaminants, alloy content, location, and biological organisms as the variables that drive it. Steel that sits in seawater, such as marine railway components, dock-edge structures, and submerged fixtures, falls under the seawater chapter, which reviews the effects of variability, pollutants, fouling organisms, and water flow velocity on corrosion.

The same volume sets out three protection methods in its marine section:

  • Metallic coatings. A sacrificial coating on a steel substrate can add 20 years or more of life, depending on its thickness and composition. The handbook covers thermal spray, hot-dip, and electroplated coatings, and protection with aluminum and zinc.
  • Organic coatings. These are the principal means of corrosion control for ship hulls and topsides and for the splash zones of permanent offshore structures, and surface preparation is the most important consideration in how a coating system performs.
  • Cathodic protection. An electrochemical means of corrosion control widely used in the marine environment, built as either an impressed current system or a sacrificial anode system.

For handling equipment, corrosion shows up at the joints and interfaces rather than on open plate: bearing seats, pin bores, fretted press fits, and crevices at weld toes and bolted joints. The corrosion-resistant equipment design article maps those interfaces against each marine exposure and covers corrosivity classes, materials, and coatings (ASM Handbook Vol. 13C, 2006, Corrosion in Marine Environments, pp. 27-78).

What sensing, drives, and PLC control does shipyard handling equipment need?​

The Subpart G rules above are written for people and gear, but most of them map to a sensor or an interlock on engineered handling equipment:

  • Load sensing. Section 1915.111(b) forbids exceeding the safe working load of gear. A load cell in a lifting beam, block-turning frame, or transporter deck measures the actual weight, so the PLC can block a lift over the rating instead of relying on an estimated block weight.
  • Radius and position sensing. Section 1915.115(c) requires a radius indicator and posted loads by radius on mobile cranes used on a vessel. On a custom slewing or luffing handler, an encoder on each axis gives the same information to the controller, which can limit travel into a radius where the posted load would be exceeded.
  • Zone interlocks. Section 1915.115(d) requires the swing radius of a revolving crane to be guarded. On engineered equipment, light curtains, laser scanners, or gated barriers wired into the safety system stop motion when someone enters the zone.
  • Positive holding. Section 1915.115(e)(1) requires a marine railway cradle to be positively blocked in the hauled position. Position switches that prove the block or pawl is engaged before the winch brake can release make that rule a permissive rather than a checklist item.
  • Tamper resistance. The anti-two-block case above shows why a safety device should not be switchable from the cab. Safety functions belong in a separate safety controller: Rockwell Automation rates a GuardLogix 5580 primary controller with a safety partner for applications up to SIL 3 and PL e, Cat. 4, and without one up to SIL 2 and PL d, Cat. 3, and only the safety task, not standard tasks, can be used for safety functions.
  • Drives and task timing. Variable-frequency drives ramp traverse and hoist motors, and servo drives such as Allen-Bradley Kinetix 5700 close position, velocity, and current loops on encoder feedback for axes that must stop at an exact point, such as a carriage; the Kinetix 5700 has safe torque-off built in. Logix 5000 controllers organize code into continuous, periodic, and event tasks, so interlock and motion logic can run at a fixed period.

The design frameworks are ISO 12100:2010 for risk assessment and risk reduction, ISO 13849-1:2023 for the safety-related parts of the control system, and IEC 60204-1:2016 for the electrical equipment of machines not portable by hand while working. UTEC Industrial, a Rockwell Automation Recognized System Integrator, builds this Allen-Bradley ControlLogix and CompactLogix control into the handling systems it fabricates (Rockwell Automation 1756-RM012J-EN-P-2025, Ch. 1; Rockwell Automation 2198-UM002E-EN-P (2018), Kinetix 5700; Rockwell Automation 1756-RM094N-EN-P-2025, Ch. 2; ISO 12100:2010; ISO 13849-1:2023; IEC 60204-1:2016).

How are shipyard handling systems tested, tuned, and maintained after startup?​

The last two links of the chain, tuning and monitoring, are where Subpart G's paperwork and the equipment's controls meet. The regulation already requires a documented life for rigging gear: a certification record for any hook tested to twice its intended safe working load under §1915.113(b)(1), an indication on each chain of the month in which it was thoroughly inspected, with a thorough inspection every 3 months, under §1915.112(c)(2), and a proof test after chain repair under §1915.112(c)(5). Engineered handling equipment adds its own records:

  • Tuning at load. The Kinetix 5700 commissioning procedure includes a tuning step for each axis, and autotuned loop bandwidths depend on the application and can require adjustment once the motor and load are connected. A carriage tuned empty may overshoot with a load on it.
  • Safety-device testing. Limit switches, block-engaged switches, and zone interlocks are tested at commissioning and on a schedule, and the failure mode to avoid is the one in the rigging case histories: a device disabled because nobody understood it.
  • Condition monitoring. Trending motor current, brake operations, gearbox temperature, and drive faults gives the maintenance program measured evidence. In a salt environment, trending also catches corrosion-driven wear at bearings and pins before it becomes a seized joint.
  • Energy isolation. The general-industry lockout/tagout standard, 29 CFR 1910.147, does not cover employment covered by Part 1915, so shipyard employment falls under a separate Part 1915 rule. For a marine manufacturing plant whose work is outside shipyard employment and under general-industry rules, 1910.147 states that push buttons, selector switches, and other control-circuit-type devices are not energy-isolating devices, and requires stored or residual energy to be relieved, disconnected, restrained, and otherwise rendered safe once lockout or tagout devices are applied. A block held by a brake or a raised cradle is that kind of energy.
  • Linked safety. Where a robot or vision system shares a cell with the handling equipment, GuardLogix safety controllers can exchange safety data with other CIP Safety devices over the network.

UTEC Industrial performs factory acceptance testing and on-site commissioning, so these tests can be written into the purchase order and demonstrated before handover (OSHA 29 CFR Part 1915, Subpart G-2026, §1915.112 and §1915.113; Rockwell Automation 2198-UM002E-EN-P (2018), Kinetix 5700; OSHA 29 CFR 1910.147-1989; Rockwell Automation 1756-RM012J-EN-P-2025).

What should a shipyard or marine plant define before requesting handling equipment?​

A request that states only a capacity leaves out most of what drives a shipyard system. A complete specification covers the full chain from design through monitoring:

  • Load envelope: weight range, dimensions, center-of-gravity location and its variation for each block, plate, or component family, and the approved pickup points, including pad eyes and lugs.
  • Rigging interface: hook, shackle, and sling ratings and markings required under §1915.112 and §1915.113, eye-bolt pull angles within 20 degrees under §1915.116(e), and whether tag lines or powered guidance will control swing.
  • Environment: seawater splash or marine atmosphere exposure, coating system, cathodic protection where parts are submerged, and sealed or protected bearings and pins.
  • Site: ground or deck capacity and levelness, where OSHA's rigging guidance (not Subpart G) calls for a crane surface level within 1 percent grade; power-line clearance, where the same guidance says equipment should not operate within 10 ft of an energized line; and whether the equipment works aboard a vessel or drydock, which triggers Part 1919 certification under §1915.115(a).
  • Controls: load sensing against the safe working load, position and radius sensing, zone interlocks for swing and travel, positive holding interlocks, and a safety controller that cannot be bypassed from the operator station.
  • Acceptance: factory and site tests, safety-device tests, and the records the yard's inspection program will keep.

UTEC Industrial fabricates, stress-relieves, and machines the welded frames of heavy handling equipment in-house before assembly, so frame stability and locating accuracy are built in before the controls are commissioned (OSHA 29 CFR Part 1915, Subpart G-2026, §1915.112, §1915.113, §1915.115 and §1915.116; OSHA Working in the Shipyard Industry: Rigging 2011, pp. C-6 and C-12).

Related Articles

References​

  • OSHA 29 CFR Part 1915, Subpart G-2026: Gear and Equipment for Rigging and Materials Handling. U.S. Department of Labor, 2026.
  • OSHA. Working in the Shipyard Industry: Rigging (Safety and Health Injury Prevention Sheets). U.S. Department of Labor, 2011.
  • OSHA. eTool: Shipyard Employment — General Requirements — Materials Handling (including Gear and Equipment for Rigging). U.S. Department of Labor, 2026 (undated web documentation, accessed September 2026).
  • Shen, H., Lee, Y., Jeong, Y.-K., Woo, J.H. (2021). "Analysis on Hull Block Erection Process Considering Variability." Journal of Ship Production and Design, 37(2), 67-77. DOI 10.5957/jspd.07190036.
  • Hudock, S.D., Reed, L.E. (2003). NIOSH Shipyard Ergonomics Project. National Institute for Occupational Safety and Health, 2003.
  • Cramer, S.D., Covino, B.S., Jr. (eds.). ASM Handbook, Volume 13C: Corrosion: Environments and Industries. ASM International, 2006. ISBN 978-0-87170-709-3.
  • OSHA 29 CFR 1910.147-1989: The Control of Hazardous Energy (Lockout/Tagout). Occupational Safety and Health Administration, 1989.
  • IEC 60204-1:2016 (Ed. 6.0): Safety of Machinery -- Electrical Equipment of Machines -- Part 1: General Requirements. International Electrotechnical Commission, 2016.
  • ISO 12100:2010: Safety of machinery — General principles for design — Risk assessment and risk reduction. ISO, 2010.
  • ISO 13849-1:2023: Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design. International Organization for Standardization, 2023.
  • Rockwell Automation 1756-RM012J-EN-P-2025: GuardLogix 5580 and Compact GuardLogix 5380 Controllers Safety Reference Manual. Rockwell Automation, 2025.
  • Rockwell Automation 1756-RM094N-EN-P-2025: Logix 5000 Controllers Design Considerations. Rockwell Automation, 2025.
  • Rockwell Automation 2198-UM002E-EN-P (2018): Kinetix 5700 Servo Drives User Manual. Rockwell Automation, 2018.

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UTEC Industrial designs, engineers, machines, fabricates, and installs custom material handling systems for heavy industry, from the stress-relieved structure and drives to the Allen-Bradley PLC controls, tuning, and monitoring that run them, at its Spokane Valley, WA facility. Send UTEC the application, loads, and duty cycle to start a system review.

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