Operation and safety instructions [PDF] (16 pages)
- Updated: 23.04.2026
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®
Better by Design Since 1939™
™
Operation and Safety Instructions
4358-5064
Step Ladder
1
Extension Ladder
5
Scaffold
Stairway Ladder
2
3 Wall Ladder
4
®
Mejor Diseño Desde 1939™
Instrucciones de operación y seguridad
Escalera de
un peldaño
Escalera
con extensión
5
Escalera para utilizar
sobre andamios
Escalera para utilizar
en escalinatas
2
3 Escalera de pared
4
1
4358-5064
Use of any ladder can be hazardous.
Read all instructions, both below and on ladder.
Always make sure the work
surface you are positioning
ladder on is able to support both
the ladder and your weight.
When used as a stairway ladder,
position only the short end on
a step. The longer end MUST BE
USED on floor or landing area.
Hold onto ladder at all times
when climbing. Maintain 3
points of contact (hands, feet,
etc.) at all times.
To prevent slip-out or tipping,
position ladder at an approxi-
mate 75 degree angle against
surface when used as an
extension ladder. To determine
approximate angle, 1, place toes
against bottom of ladder side
rails. 2, stand erect. 3, extend
arms straight out. 4, palms of
hands should touch top of rung
at shoulder level. 5, extend
ladder one to three feet above
top support.
Stay away from electrical lines;
this ladder will conduct
electricity.
When climbing up to a roof, always
secure ladder to roof to prevent
side motion or ladder slip-out.
Keep hands out from between
rail sections and hinges while
making adjustments.
Ladder feet must always be on
a flat surface. Do not use ladder
on unstable surfaces such as
mud, sand, slick areas, soft clay,
etc. where ladder may shift.
Never climb any ladder higher
than second rung from top.
Wear slip resistant shoes and
always check that rungs are
free of oil or other substances.
Always make sure ladder is in
good working order.
Never lean beyond ladder center
to avoid ladder tipping.
Never use ladder as a bridge or
ramp.
Always practice safe ladder usage
1
2 3
4
5
Read all instructions before using! Keep for future reference
Make sure all locks are in working order and completely
locked before using ladder.
Table of Contents:
___________________________________________________
Specifications........................................................................................... .1
Warnings & Safe Ladder Usage................................................................. 2
A. Product description............................................................................... 3
B. Product components............................................................................. 3
C. Hinge Lock operation............................................................................ 4
D. Rail Lock operation............................................................................... 5
E. Adjusting height................................................................................ 6, 7
F. Step Ladder setup................................................................................. 8
G. Stairway Ladder setup..........................................................................9
H. Wall Ladder setup................................................................................. 9
J. Extension Ladder setup.......................................................................10
K. Scaffold setup............................................................................... 11, 12
L. Warning labels..............................................................................13, 14
M. Warranty, Model & Contact Information ..............................................15
Product specifications:
➊➋➌
➎
➍
Weight
Storage
Step Ladder
Scaffold
Extension
Model
Capacity*
Height
Height** †
Height †
Ladder Height †
13 Ft Type II
225 lb
3 ft, 7 in
3 ft to 5 ft
1 ft to 2 ft
7 ft to 11 ft
_________________________________________________________________
13 Ft Type IA
300 lb
3 ft, 7 in
3 ft to 5 ft
1 ft to 2 ft
7 ft to 11 ft
_________________________________________________________________
17 Ft Type II
225 lb
4 ft, 7 in
4 ft to 7 ft
1 ft to 3 ft
9 ft to 15 ft
_________________________________________________________________
17 Ft Type IA
300 lb
4 ft, 7 in
4 ft to 7 ft
1 ft to 3 ft
9 ft to 15 ft
_________________________________________________________________
21 Ft Type IA
300 lb
5 ft, 7 in
5 ft to 9 ft
1 ft to 3 ft
11 ft to 19 ft
_________________________________________________________________
*Includes user and materials
**Step ladder, Stairway ladder and Wall ladder
† Heights are rounded to nearest foot
1
2
A. Product description:
The Cosco® All-In-One-Ladder is com-
prised of a system of three components,
an Inner Ladder Unit and two
Outer Ladder Units
which telescope over
the Inner Ladder Unit.
Inner Ladder Unit
Outer Ladder Units
B. Product components:
The Cosco® All-In-One-Ladder utilizes two types of locking systems. The
Inner Ladder Unit has two center locking hinges which allow the ladder
system to be reconfigured into five ladder types: ➊ Step, ➋ Stairway,
➌ Wall, ➍ Scaffold and ➎ Extension ladder configurations.
Four Rail Lock Pins on the Outer Ladder Units of the ladder permit the
telescoping sections to be adjusted in length. This rail lock pin assembly
fits in any Rail Lock Port of the Inner Ladder Unit, allowing foot by foot
adjustment on either end of the ladder.
Storage
position
Fig. A1
Fig. B1
Rungs
C. Hinge Lock operation
The hinges are locked when the small arrow on the Hinge Lock Knobs are
aligned with the arrow stamped on the hinge body, (See Fig. C1) and
unlocked when the arrows are mis-aligned. (See Fig. C2).
Fig. C1
Fig. C2
3
4
Fig. C4
To return ladder to the storage configuration (See Fig. A1), repeat hinge
release procedure (press and rotate Hinge Lock Knobs) and fold ladder
halves together, repeating lock release/fold procedure as necessary until
ladder is completely folded.
Note: Pinch hazard! Be aware of sliding/moving parts. Keep hands and feet
clear.
LOCKED WHEN
ARROWS ALIGNED
Hinge
Lock
Knobs
Hinge
Lock
Knobs
Rail
Lock
Pins
Rail
Lock Ports
LOCKED WHEN
ARROWS ALIGNED
LOCKED
LOCKED WHEN
ARROWS ALIGNED
UNLOCKED
LOCKED WHEN
ARROWS ALIGNED
1. The hinges operate as follows:
To release locks, press in on Hinge
Lock Knobs and rotate in the direc-
tions indicated by large arrows, (See
Fig. C3). An audible “click” will be
heard, indicating the hinge locks are
released (See Fig. C2). The ladder
may now be opened to
the next locked position.
2. Pull the two ladder
halves apart (See Fig.
C4) until another,
louder “click”
is heard, indicating
the next locked
position has been
reached (See Fig.
C1).
1
Push
2
Turn
Fig. C3
D. Rail Lock operation:
The second locking component of the ladder system is the Rail Lock
system. There are four spring-loaded Rail Lock Pins that permit you to
change the height of the ladder. Rail locks operate as follows:
Note: Always adjust ladder while it is flat on the ground to ensure locks
don’t slip. Always start with folded ladder flat with the rail locks on sides,
as shown. Be aware of sliding/moving parts. Keep hands and feet clear.
1. To Unlock: Pull out both Rail Lock
Pins and rotate to rest on
Outer Ladder Units. Release.
See Fig. D1.
Fig. D1
Fig. D2
2. To Lock: Rotate both Rail Lock Pins back and align with Rail Lock Ports
in Inner and Outer Ladder Units. Release and insert Rail Lock Pins
into ports in both the Outer Ladder Unit and the rung
ports in the Inner Ladder Unit. See Fig. D2.
E. Adjusting height:
Use these instructions when ladder is used in
➊ Step, ➋ Stairway, ➌ Wall ladder and ➍ Extension
Ladder configurations.
Note: Always adjust ladder while it is flat
on the ground to ensure locks
don’t slip. Always start with
folded ladder flat with the
rail locks on sides,
as shown in Fig. E1.
1. Unlock both Rail Lock Pins
as described in D. Rail Lock
operation, Step 1 (page 5).
2. Slide top Outer Ladder Unit
to desired length, aligning
ports in Outer Ladder
Unit with ports in Inner
Ladder Unit.
5
6
Fig. E2
Fig. E3
Fig. E1
Note: Pinch hazard! Be aware of sliding/moving parts. Keep hands and
feet clear.
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