Extension ladders are one of the most commonly used tools in construction, maintenance, roofing, utilities, and facility work. Because they are so familiar, workers sometimes underestimate the risks involved. However, extension ladders are associated with a significant number of serious falls and injuries every year.
Falls remain one of the leading causes of workplace fatalities, particularly in construction. According to OSHA, workers who use extension ladders face hazards that can result in serious injury or death, including falls and electrocutions. These hazards can often be eliminated or significantly reduced by following proper ladder safety procedures.
Many workers assume extension ladder safety is just common sense — lean it against a wall, climb up, and get the job done. But ladder incidents often happen because of improper setup, damaged equipment, rushing, poor inspection practices, or simple shortcuts.
OSHA Standard 1926.1060(a) requires employers to provide training for employees using ladders and stairways so workers can recognize hazards and understand procedures to minimize risk.
Extension Ladder Inspections
An extension ladder should be inspected before every use, even if it was used safely the day before. Conditions can change quickly, and damaged ladders can fail without warning.
Before climbing, inspect the extension ladder for:
- Cracked, bent, split, or damaged side rails
- Missing, bent, or damaged rungs
- Loose bolts, rivets, or hardware
- Damaged rung locks (dogs or pawls) that may slip
- Frayed or damaged rope and pulley systems
- Missing or damaged foot pads or feet assemblies
- Excessive mud, grease, paint, or slippery substances on rungs
The ladder should fully extend and lock properly. Locks must engage securely on both rails before climbing.
Remove Damaged Ladders From Service
Any extension ladder found to be defective should be removed from service immediately.
Never use wire, tape, screws, rope, or homemade fixes to repair a damaged ladder. Temporary repairs may create a false sense of security and can result in catastrophic failure while someone is elevated.
If labels or weight ratings are unreadable or painted over, remove the ladder from service until it can be properly evaluated.
Never Modify an Extension Ladder
An extension ladder should never be disassembled to create smaller ladders or repurposed sections.
For example, workers sometimes attempt to use only the top fly section of an extension ladder by itself. This is extremely dangerous because that section is not designed to function independently and may be missing critical components like foot assemblies or slip-resistant feet.
Missing feet or foot pads can allow a ladder to slide unexpectedly, creating a serious fall hazard.
Always use extension ladders exactly as designed by the manufacturer.
Proper Extension Ladder Setup
Improper ladder angle is one of the most common causes of extension ladder incidents.
Extension ladders should be placed using the 4-to-1 rule. For every 4 feet of vertical height, place the ladder base 1 foot away from the structure.
For example:
- 16 feet high = base 4 feet out
- 20 feet high = base 5 feet out
If the ladder angle is too steep, it may tip backward. If too shallow, it may slide out at the base.
Always place an extension ladder on stable, level ground. Do not place ladders on loose gravel, mud, ice, slippery surfaces, boxes, pallets, bricks, or makeshift platforms.
When an extension ladder is used to access a roof, platform, or elevated work surface, the side rails should extend at least 3 feet above the landing area. This gives workers something secure to hold while stepping on or off the ladder and reduces the risk of losing balance during transition.
Climb a Ladder Safely
When climbing an extension ladder, always maintain three points of contact. Always face the ladder when climbing and descend carefully.
Workers should avoid carrying tools or materials in their hands while climbing. Instead, use tool belts, rope systems, or material lifts.
Overreaching is a major contributor to ladder falls. Keep your body centered between the side rails and avoid leaning too far to either side. If something cannot be reached comfortably, climb down and reposition the ladder. A good rule of thumb: keep your belt buckle between the ladder rails.
Never stand on the top few rungs of an extension ladder. Workers should remain below the manufacturer’s highest standing level to maintain stability and avoid losing balance.
Electrical Hazards and Ladders
One of the deadliest hazards involving extension ladders is contact with electricity. Metal ladders conduct electricity and should never be used near energized overhead power lines or electrical equipment. Even fiberglass ladders, which are more resistant to electricity, can become conductive if dirty or wet.
Before setting up an extension ladder, always look overhead for:
- Utility lines
- Service drops to buildings
- Temporary electrical lines
- Energized equipment nearby
Maintain safe distances from all electrical hazards.
Ladder Work Area Safety
Extension ladders placed near doorways, walkways, or vehicle traffic are at greater risk of being struck or displaced.
Protect the ladder area by:
- Using cones or barricades
- Posting warning signs
- Locking nearby doors if practical
- Keeping workers and vehicles clear of the setup area
Never allow multiple workers on an extension ladder unless the ladder is specifically designed for that purpose.
Follow Ladder Manufacturer Instructions
Every extension ladder has a specific duty rating and weight capacity.
This rating includes:
- The worker’s body weight
- Clothing and PPE
- Tools and equipment being carried
Overloading a ladder can damage components and increase the risk of failure.
Always follow the manufacturer’s recommendations for inspection, setup, use, storage, and maximum load limits.
Taking a few extra minutes to inspect and properly set up an extension ladder can prevent serious falls, injuries, and fatalities. Extension ladders may seem simple, but using them safely requires training, attention, and consistent safe work practices.
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