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ASME B30.16-2017 — Overhead, Underhung and Stationary Hoists
🏭 ASME B30.16-2017 governs the most ubiquitous lifting machines in the factory — overhead, underhung and stationary hoists. An “underhung” hoist hangs from a monorail or under a carrier and travels with it along the track; a “stationary” hoist is fixed in position and performs purely vertical lifting. Drives span hand chain, electric and air power; load elements span chain and wire rope. Because hoists are numerous, used constantly and operated directly by front-line workers, B30.16 is designed for clarity: legible marking, inspections simple enough to execute reliably, and an explicit training requirement. It is one of the B30 volumes closest to everyday industrial safety.
💡 Most hoist accidents are not caused by big loads but by accumulated small defects: failed upper-limit devices, chain wear never measured, anti-free-fall protection never tested, a faulty pendant still in service. B30.16 institutionalises pre-use visual checks and periodic inspections precisely to intercept those small problems.
1. Scope and Hoist Classification 📌
B30.16 applies to hand-chain-operated chain hoists, electric-powered chain hoists, air-powered chain hoists, electric-powered wire rope hoists, air-powered wire rope hoists, stationary hoists, and their use with carriers, tracks and suspension fittings. Chapter 16-0 establishes scope, definitions, personnel competence and references; four technical chapters follow:
- Chapter 16-1, Marking, Construction and Installation;
- Chapter 16-2, Inspection and Testing (with dedicated inspection tables for hand-chain and powered hoists);
- Chapter 16-3, Operator Training and Operation (signals, planned engineered lifts, lockout/tagout);
- Chapter 16-4, Maintenance Training and Maintenance (rope, welded link chain, roller chain).
| Hoist Type | Drive | Load Element | Typical Application |
|---|---|---|---|
| Hand-chain-operated chain hoist | Manual pull chain | Welded link chain | Light maintenance, tool rooms, no-power areas |
| Electric/air-powered chain hoist | Electric / air motor | Chain | Production line feeding, machine loading, assembly |
| Electric/air-powered wire rope hoist | Electric / air motor | Wire rope | Heavier loads and longer lift travel |
| Stationary hoist | Electric / manual / air | Chain or wire rope | Fixed-station vertical lifting, pouring and assembly |
⚠️ B30.16 covers the hoist itself and its carrier/track accessories. Where a hoist forms part of a monorail or underhung crane system, the track and interlock requirements of B30.11/B30.17 also apply. A single installation is usually governed by several volumes at once.
2. Marking, Construction and Installation 🔧
Chapter 16-1 requires the hoist to be marked in a conspicuous location with rated load, manufacturer name and model, and date of manufacture, backed by a permanent nameplate. Construction requirements cover transmission parts, chain wheel/drum, brake and hook with adequate strength and life; the brake must hold the rated load reliably and prevent accidental load descent. Installation requires suspension points, carriers, tracks and hangers capable of carrying the rated load plus shock, with track level and limit functions verified after installation. Hooks meet B30.10; chain and rope meet wear and fatigue requirements.
3. Inspection and Testing 🔍
Chapter 16-2 sets a very workable inspection regime:
- Frequent inspection: the using crew checks chain/rope condition, hook, brake action and limit functions before each use.
- Periodic inspection: a competent person works through the check list (Table 16-2.1.4-1 for hand-chain hoists, Table 16-2.1.4-2 for electric/air hoists) on schedule — chain link wear and elongation, rope broken wires, brake clearance, electrical insulation and pendant function.
- Testing: after installation, after major repair and periodically, at rated load, verifying brakes and limits; any anomaly means immediate removal from service.
| Component | Frequent Check | Periodic Check | Removal / Repair Criterion |
|---|---|---|---|
| Load chain | Visual fractures / distortion | Measure wear and elongation | Wear or elongation at limit, cracks |
| Wire rope | Visual broken wires / kinks | Broken-wire counting, diameter measurement | Removal criteria reached (wires/wear/corrosion) |
| Hook | Visual throat / tip | Throat opening and wear measurement | Per B30.10 removal criteria |
| Brake | Test-lift confirms holding | Clearance and friction surface check | Insufficient braking torque — repair |
| Limits and pendant | Operational verification | Function and wiring check | Abnormal action — remove from service |
🚨 The “dual brake” concept must be honoured: a load brake (normally closed) grips on power or air loss, and an overspeed/anti-free-fall device (for example a centrifugal speed limiter) prevents uncontrolled load descent. Any powered chain hoist without overspeed protection does not meet the safety intent of B30.16.
4. Operator Training and Operation 🎓
Chapter 16-3 requires operators to complete training and demonstrate knowledge of: rated load, the meaning of controls and limits, correct hitching and lifting methods, signals, prohibitions (no overload, no oblique pulls, no riding loads, no leaving a suspended load after going off duty), and emergency response. Persons other than operators — riggers and signalers — receive appropriate basic training. Complex lifts follow the planned engineered lift procedure, with a written and approved plan.
5. Maintenance and Replacement Rules 🧰
Chapter 16-4 requires maintenance by trained personnel:
- Rope (16-4.4): replace the whole rope when removal criteria are reached; terminations and drum fastening per the manufacturer;
- Welded link chain (16-4.5): inspect welds, wear and elongation; replace sets with identical specification;
- Roller chain (16-4.6): check pitch elongation, pin looseness and lubrication.
Lockout/tagout precedes all maintenance; lubrication, fastening and adjustment follow the manufacturer’s manual; replacement parts match the original specification.
6. Engineering Practice Essentials 🛠️
- 🔍 Correct selection: choose hoist type and size by maximum load, lift height, duty class and environment (temperature, dust, explosion hazard).
- 📏 Limit setting: set upper/lower limits to the actual lift travel and verify them periodically; never use limits as the normal stopping method.
- 🔌 Electrical and air supply: electric hoists need proper earthing, insulation and pendant protection; air hoists need clean, lubricated, stable-pressure air.
- 📋 Registers: keep an inspection and maintenance register per hoist, logging frequent/periodic results and replacement components.
- 🧑🤝🧑 Documented training: archive operator training records; new and reassigned staff complete equipment training before first use.
7. Frequently Asked Questions ❓
❓ Q: May the electric hoist’s upper and lower limits be used as “stop switches”?
A: No. Limits are protection against overtravel. Using limits routinely as the stopping method damages the limit mechanism and entrenches bad habits; normal stops are made by the operator before the limit.
A: No. Limits are protection against overtravel. Using limits routinely as the stopping method damages the limit mechanism and entrenches bad habits; normal stops are made by the operator before the limit.
❓ Q: Can a worn load chain be replaced by just one new section?
A: No. Chain should be replaced as a complete set with identical specification; mixing new and worn links creates uneven load sharing and chainwheel sprocket mismatch, risking chain jump and detachment.
A: No. Chain should be replaced as a complete set with identical specification; mixing new and worn links creates uneven load sharing and chainwheel sprocket mismatch, risking chain jump and detachment.
❓ Q: How do air-powered and electric hoists differ in safety considerations?
A: Air hoists produce no electrical spark and suit explosion-hazard areas, but watch capacity loss at low pressure and exhaust noise; electric hoists require attention to earthing, insulation, pendant guarding and cable/conductor-bar safety. Both need dual-brake and overspeed protection.
A: Air hoists produce no electrical spark and suit explosion-hazard areas, but watch capacity loss at low pressure and exhaust noise; electric hoists require attention to earthing, insulation, pendant guarding and cable/conductor-bar safety. Both need dual-brake and overspeed protection.
❓ Q: What is the risk of leaving a load suspended for a long time?
A: Prolonged suspension keeps brake, chain/rope and hook under continuous load, accelerating wear and creep, with greater consequences if failure occurs while personnel are away. Lower the load before finishing work or leaving the station.
A: Prolonged suspension keeps brake, chain/rope and hook under continuous load, accelerating wear and creep, with greater consequences if failure occurs while personnel are away. Lower the load before finishing work or leaving the station.
