| THE 4-TO-1 RATIO
The 4-to-1 Ration applies to the distance the ladder's base must be from the foundation. This is figured by dividing the length of the structure from the ground to the top support point (where the ladder rests against the building) by four. It does not include the three foot extension to 15 feet, the ladder's base should be three feet from the foundation. The 4-to-1 Ratio is important because the angle it creates utilizes the ladder's strength and gives you optimum balance when climbing. |
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| 3-FOOT RULE
Extending the ladder three feet beyond the roof prevents you from tipping the ladder by stepping on one of the top steps. Never step over the top of the ladder. Step sideways onto the roof. |
SELF-SUPPORTING LADDERS
Self-supporting ladders or stepladders should be set up so that all four legs are on solid ground and the spreaders are locked. Do not use a self-supporting ladder as a straight ladder by leaning it against a structure.
FOOTING SUPPORT
Place the ladder on a firm, even surface whenever possible. If the ladder must be placed on uneven ground, use a ladder leveler. These attach to the ladder rails and can be adjusted to balance the ladder. Never use boards or boxes to level our the ladder or to achieve additional height.
The feet of an extension ladder should be flat on a hard surface and in the spiked position on soft ground or grass. Rubber feet can be attached to a wood ladder to prevent slipping on a concrete surface.
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