LADDER JACKS
Model #2420, #2430, #2400
LADDER
ACCESSORIES
INSTRUCTIONS FOR THE INSTALLATION AND
USE OF LADDER JACK SCAFFOLD BRACKETS
– MODEL #2400, #2420 & #2430
Capacity: Two men per staging plus 75 pounds.
Ladder requirements:
Model #2400 Side Rail Steel Ladder Jack - Use on Industrial grade,
250 pound rated Type 1 or 300 pound rated Type 1A ladder
aluminum or wood ladders. Do Not Use with Fiberglass Ladders. This
style ladder jack should be used only with wooden walk planks.
Model #2420 & #2430 Aluminum Rung Style Ladder Jack - Use on
Industrial grade, 250 pound rated Type 1 or 300 pound rated Type
1A ladder aluminum or Fiberglass ladders. Do Not Use with Wood
Ladders.
Setting the Ladder:
Insure that both feet are secured rmly at ground level. The top
section of both ladders should rest at against the building. The
feet of each ladder should be set into the ground 3” to 4” when
an earthen base is available. If working on a solid base the ladder
should be equipped with proper cleats. The top of the ladder
should then be tied down to prevent slipping. The ladder must be
erected at a pitch of 75 degrees, in accordance with ladder safety
standards, so that the distance between the ladder base and the
vertical wall is one-quarter the working length of the ladder.
Attaching Ladder Jacks:
Model #2400 Side Rail Steel Ladder Jack: This ladder jack can
be installed both on the inside or the outer side of the ladder
depending on the distance between the ladder and the work wall.
The rectangular bars of the ladder jack attach to the ladder by
capturing each of the side-rails of the ladder as well as resting on
one of the ladder’s rungs. Be sure that the rectangular bars are
placed fully into the ladder’s opening and down onto the rung so
as to fully engage the rung. The round hook shaped bars of the
ladder jack should then be placed around the side-rails of the ladder,
resting above the rectangular bars. Adjust the gusset plate, which is
attached to the base of the round bars so that the rectangular bars,
which become the support arms for the platform, are parallel to
the ground creating a level platform. Secure gusset plate by sliding
rmly into the appropriate notch in the center bar.
Model #2420 & #2430 Aluminum 2-Rung and 3-Rung
Ladder Jack: This ladder jack can be installed both on the inside
or the outer side of the ladder depending on the distance between
the ladder and the work wall. Inspect all scaffold components for
damage before each use. Test all working parts and make sure all
nuts & bolts are tight before each use. Do not substitute parts.
Install ladder jack so that the rung support arms seat fully onto the
ladder rungs. Do not use if ladder jack top rung support opening is
over 2-1/4 inches. Adjust support arm so the arm is parallel to the
ground creating a level platform. Securely tighten the wing nut to
prevent slippage during use. Do not use ladder jack if parts are bent,
cracked, or damaged. Mark such ladder jacks “DANGEROUS – DO
NOT USE” and discard or contact manufacturer.
Setting the platform:
Adjust ladder jack so that walk plank is horizontal. Be sure that the
scaffold plank is supported at least 12 inches, but not more than
18 inches from each end and is securely placed in order to prevent
slipping. (Do not use extension planks on ladder jack scaffolds) Do
not use ladder jack scaffolding beyond a height of 20 feet (16 feet in
California) above the oor or ground. Failure to do so could cause
injury. Be sure that the ladder jack scaffold complies with local,
state and federal safety requirements. When using wooden walk
planks the distance between ladders should not exceed 8 feet. The
maximum plank length is 10 feet. Use clear straight-grained scaffold
grade lumber. Planking should not be less than 2” x 10” nominal
thickness. Always use two planks to fully deck the platform arms
(18” minimum width).
Customer Support and Ordering Information
781-344-1000 • www.qualcraft.com
Instructions for use:
No more than 2 people shall occupy any ladder jack scaffold. Only one set
of ladder jacks can be used between any two ladders. Do not install more
than one ladder jack per ladder. Do not overload – do not exceed 250
pound load on one ladder jack or ladder. Overloading could cause injury.
Do not step or stand on plank retaining tab (Model #2420 & 2430) .State
and Federal OSHA regulations require the use of an OSHA compliant fall
arrest system when working height exceeds 6 feet above the ground
Care and Maintenance:
Inspect ladder jack scaffold before and after each use, be sure that
there is no damage, deformation or rusting and that all nuts & bolts are
tight before each use. Discard if necessary. Do not throw or drop from
building or onto a truck. Always handle with care. Do not use if ladder
jack has been exposed to extreme heat or cold, discard at once. Do not
use if scaffold is wet or frozen. Federal Regulations require the user
have knowledge of all regulations that apply to the use and care of this
product and that the employer provide training.
CAUTION! Metal conducts electricity. Keep metal ladder and ladder
jacks away from electrical circuits. Injury can result.
CAUTION! Acid damages aluminum. Never use a ladder when using
acid. Injury can result.
© Copyright 2001-2003
Qual-Craft Industries, Inc.,
Stoughton, MA 02072
