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Ladder Length Guidelines

The following table is provided for your convenience.  We believe that the data presented is reliable, however we make no claim as to the accuracy of the information.

 

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Ladder Length Guidelines
STEP LADDER
HEIGHT SELECTION GUIDE
  EXTENSION LADDER
LENGTH SELECTION GUIDE

STEP
LADDER
SIZE

APPROX.
HIGHEST
STANDING
LEVEL

 

LADDER SIZE

MAXIMUM EXTENDED LENGTH

*WORKING RANGE TO TOP SUPPORT

*MAXIMUM ACCESSIBLE ROOF HEIGHT RANGE

4' 1' 11"   16' 13' 7-1/2' - 12 1/2' 4-1/2 - 9-1/2'
5' 2' 10"   20' 17' 9-1/2 - 16-1/2' 6-1/2 - 13-1/2'
6' 3' 9"   24' 21' 11-1/2 - 20' 8-1/2 - 17'
7' 4' 9"   28' 25' 13-1/2 - 24' 10-1/2 - 21'
8' 5' 8"   32' 29' 15-1/2 - 28' 12-1/2 - 25'
10' 7' 7"   36' 32' 17-1/2 - 31' 14' - 28'
12' 9' 6"   40' 35' 19' - 33-1/2' 16' - 30-1/2'
14' 11' 5"   44' 39' 21' - 37-1/2' 18' - 34-1/2'
16' 13' 4"   48' 43' 23' - 41-1/2' 20' - 38-1/2'
18' 15' 3"   60'
(3 section extension)
48' 23' 46-1/2' 20' - 43-1/2'
20' 17' 2"   *When set up at the proper 75-1/2 angle

 

 

Ladder Types
TYPE DUTY RATING WORKING LOAD
(LBS. MAX)
IA Industrial-extra heavy 300
I Industrial-heavy 250
II Commercial-medium 225
III Household-light 200

 

 

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