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A0470118revG.doc ©Copyright 

Cotterman

® 

Co. 2007 

1 OF3 

 

ASSEMBLY OF THE 

KNOCKED-DOWN LADDERS

12 to 16 STEPS WITH 10”, 12”, 20”, 24”  & 30” DEEP TOP STEP  

AND SAFELOCK 

 

TOOLS REQUIRED FOR ASSEMBLY 

1 RUBBER 

MALLET 

STEP LADDER 

1 7/16" 

WRENCHES 

2 9/16" 

WRENCHES 

2 1/2" 

WRENCHES 

 

WARNING: 

ASSEMBLY OF THESE TYPES OF LADDERS IS INHERENTLY DANGEROUS.  PLEASE TAKE ALL 
PRECAUTIONS NECESSARY DURING THE ASSEMBLY PROCESS.  ALWAYS USE A SEPARATE 
LADDER TO FINISH ASSEMBLY IN HIGH PLACES.  NEVER CLIMB A LADDER THAT IS NOT 
COMPLETELY ASSEMBLED. A FALL RESULTING IN SERIOUS INJURY OR DEATH CAN OCCUR IF 
ANOTHER LADDER IS NOT USED DURING ASSEMBLY.   USE PROPER LIFTING MECHANICS 
WHEN SETTING UP THE LADDER.  NEVER ASSEMBLE THE LADDER ALONE.

 

 

STEP 1 – INSTALL HANDRAILS 

UNPACKAGE AND SORT ALL COMPONENTS. START BY PLACING THE LADDER STILE ON THE 
FLOOR, WITH THE STILES FACING UPWARD.  SLIP THE HANDRAILS (H, I) INTO THE REAR 
STAIRWAY TUBES 

(DRAWING A, FIGURE 1). 

USE THE RUBBER MALLET AS NEEDED FOR MATING 

PARTS.  CLAMP HANDRAILS TO OUTSIDE OF STAIRWAY TUBES USING HANDRAIL BRACKETS, 5/16-
18 x 1 ¾” HEX HEAD CAP SCREWS AND LOCKNUTS 

(DRAWING A, FIGURE 2).

 

NOTE:  DO NOT TIGHTEN ANY BOLTS UNTIL INSTRUCTED TO DO SO. 

 

STEP 2 – EXTENDED PLATFORMS ONLY 

INSTALL HANDRAIL EXTENSION PANELS (J) INTO SUPPORT TUBES LOCATED ON THE SIDE OF THE 
PLATFORM 

(DRAWING A, FIGURE 3).

 CLAMP HANDRAIL EXTENSION PANEL TO HANDRAIL 

PANELS USING EXTENSION CLAMPS AND 5/16-18 x 2” HEX HEAD CAP SCREWS & LOCKNUTS 

(SEE 

DRAWING A, FIGURE 4).        

NOTE: THE HANDRAILS EXTENSION PANELS ARE NOT  

ON THE STANDARD PLATFORM LADDERS 

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