Extension Ladder Sizing and Safety Guide for DFW

The Professional’s Guide to Safe Vertical Reach

When you are working on commercial exteriors or multi-story residential projects in North Texas, reaching the roofline safely is a matter of mathematics and the right equipment. Many contractors mistakenly buy a ladder based on its total length without accounting for the overlap and the safe working angle.

At Dallas Ladder, we stock the Louisville FE3200 Fiberglass Extension Series because it provides the stability and specialized locking mechanisms needed for high-reach tasks.

Calculating Your Reach: The 4-to-1 Rule

To stay OSHA compliant and prevent kick-outs, your ladder base should be 1 foot away from the wall for every 4 feet of height. This means a 24-foot ladder doesn't actually give you 24 feet of vertical reach. You must also account for the mandatory 3-foot extension above the roofline for safe transition.

Extension Ladder Quick Reference:

16-Foot Ladder: Max Extended Length: 13ft | Max Reach: 15ft

24-Foot Ladder: Max Extended Length: 21ft | Max Reach: 23ft

32-Foot Ladder: Max Extended Length: 29ft | Max Reach: 31ft

Why Louisville MAXLOCK Technology Matters

One of the standout features of our extension stock is the MAXLOCK rung lock. Unlike generic gravity locks, MAXLOCK is custom-engineered from a patented, advanced molecular polymer. It is the strongest and lightest rung lock available, ensuring your ladder stays securely extended even under heavy loads.

Combined with the heavy-duty Slide Guides and slip-resistant feet, these ladders are built for the daily grind of professional construction.

In-Stock and Ready for Pickup in Rowlett

Need a 32-foot or 40-foot extension today? We carry the heavy-duty industrial models that big box stores don't keep in the yard.

Shop Fiberglass Extension Ladders
Apr 27th 2026 Noah Khomer

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