Ladders and scaffolds

When work is high or long-duration, scaffolds generally provide the safest working platforms. Job-site scaffold sections stack to height; adjustable feet level the base; X braces between end frames create a rigid platform.

Types you will see:

• Fixed/stacked sections built from standard frames,
• Rolling scaffolds with wheels (for level floors) — lock wheels after positioning,
• Suspended/hanging scaffolds on cables for building exteriors, raised by crank or motor.

Use guardrails, deck planks, and tie-offs per manufacturer and OSHA when required.

Straight ladders have rungs between two rails and safety feet to reduce slip. Before climbing, read the load capacity on the side label — common ratings include 200, 250, and 300 pounds. Include your weight, tools, and materials in that budget.

Set the ladder at about 76° to the structure. A practical rule: move the base away from the wall a distance equal to one-fourth the ladder length. A 20 ft ladder → base about 5 ft from the wall.

If the ladder provides access to a roof or platform, extend the top 3 feet above the landing so the climber can transition safely.

Ladders for electrical work are usually wood or fiberglass. Aluminum ladders conduct electricity — avoid them for electrical tasks unless company policy explicitly allows specific conditions.

Wet or dirty fiberglass still demands care; treat any ladder near energized parts as part of the shock path planning you learned in current-effects lessons.

Step ladders are self-supporting with hinged front and back sections and a spreader locked open. Check load rating just like straight ladders.

Manufacturers warn: do not use the top step — balance becomes unsafe. Many people mistake the top step for the “top of the ladder”; the ladder top is the cap above the last usable step. Standing on the top step is a common fall cause.

Height work stacks hazards:

• fall from ladder or scaffold,
• contact with overhead conductors,
• dropping tools on people below.

Use harness/lanyard when rules require, hard hat below overhead work, and barricades under scaffolds when objects could fall. Do not lean ladders on live buswork “just to reach” — plan access.

If wind, ice, or overload makes the platform feel wrong, it is wrong — stop and rebuild.

On rolling scaffolds, lock all wheels before climbing. Never ride a rolling scaffold like a cart. Keep the floor level and clear of cords that could roll the base.

Suspended scaffolds depend on cable anchors and motors — inspect cables, counterweights, and brakes per the erector’s program. Electrical work from suspended platforms still requires clearance from overhead conductors; metal poles and ladders do not mix with bare lines.

When climbing any ladder, maintain three-point contact — two feet and one hand, or two hands and one foot. Carry tools on a belt or hoist line, not in your teeth or stacked in both hands.

Dropping a screwdriver from height injures people below and sends you reaching for balance. Plan material lifts before you climb.

Situation. A helper sets a 24 ft aluminum ladder against a service mast to reset a tripped overhead light, base almost against the wall for “stability,” top barely at the eave. The ladder slips; the helper grabs the mast.

How to think with this lesson.

• Aluminum + electrical service = shock path risk.
• Base too close → angle too steep → slip.
• No 3 ft extension above landing made transition unsafe.

Learning conclusion: fiberglass/wood, 1/4 base distance, 76°, 3 ft extension, load rating — every time.