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Products > Jobsite-Storage-Equipment > Jobsite Storage > Piano > Model 89 STORAGEMASTER® Piano Box, 47.8 cu ft

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Model 89 STORAGEMASTER® Piano Box, 47.8 cu ft


The Model 89 STORAGEMASTER® Piano Box measures 60 in wide, 78 in tall and has a capacity of 47.8 cu ft. Ideal for mechanical trades, it is caster-ready and includes full-width shelves for organization of tools and supplies. It also features a bi-fold cover which folds completely out of the way for unrestricted access.


  • WATCHMAN® IV Lock System with recessed lock housing for protection against theft
  • Additional reinforcement between the lock and the side housing
  • Power Pass® electrical pass-through grommet provides easy, weatherproof power cord access
  • Heavy-duty hinges are extra durable and resist pry-ins
  • Powder-coat finish for superior durability and corrosion resistance
  • Four-way skids allow access from any side, making it easier and faster to transport
  • Closed height 49 in
  • Open height 78 in
  • Caster-ready 14-gauge steel skids to accommodate optional casters
  • Recessed handles for positive gripping even with gloves on
  • Gas spring guards to prevent damage from shifting loads
  • Improved ball stud bracket provides added strength reduces the potential for breakage and improves durability
  • The workhorses on any jobsite, STORAGEMASTER® is ideal for every trade — mechanical, plumbing, HVAC, electrical, rough and finish carpentry


FeatureSize / Details
StylePiano Boxes
Height46 in
Width30 in
Length60 in
Approx. Cu. Ft. Per Unit47.8
Closed Height49 in
Electrical AccessPower Pass® Electrical Pass-Thru
Lock SystemWATCHMAN® IV Lock System
Powder Coat FinishYes

Package Contents

Part NumberQtyDescription



Additional Piano Models

Model No.HeightLengthApprox. Cu. Ft. Per UnitClosed HeightBrand Buy Online
100054-1/2 in66 in4854-1/2 inMONSTER BOX®
When cover is closed, chest can be used as a work table.
34-1/4 in60 in35.337 inJOBMASTER®
7949 in48 in38.249 inSTORAGEMASTER®
79-D49 in48 in36.249 inSTORAGEMASTER®
79-DH49 in48 in38.249 inThermoSteel™
79-H49 in48 in36.249 inThermoSteel™
8946 in60 in47.849 inSTORAGEMASTER®
89-D49 in60 in43.849 inSTORAGEMASTER®
89-DH49 in60 in47.849 inThermoSteel™
89-H49 in60 in43.849 inThermoSteel™
9049 in72 in57.549 inSTORAGEMASTER®
9149 in72 in57.549 inSTORAGEMASTER®

What is the dry weight of the Model 89?

Asked by: Anonymous
340 lbs
Answered by: Werner Customer Care
Date published: 2017-04-13

What is the maximum weight the Model 89 and 90 can carry?

Asked by: Anonymous
All Knaack boxes with skids are rated at 2500lbs but are not published.
Answered by: Werner Customer Care
Date published: 2015-06-22

Can one purchase new shocks for the Gang Box Lids and part number if available?

Asked by: Anonymous
Yes the gas springs are available as a replacement part. The part number you are looking for is 977-2pk.
Answered by: Werner Customer Care
Date published: 2015-08-18

Is trhe Model 89 Weather Proof for outside field use?

Asked by: Anonymous
The 89 box is not weather proof.
Answered by: Werner Customer Care
Date published: 2015-05-06

what is the lifting weight capacity of the handles on a model 89 box

Asked by: Anonymous
The side handles on the Jobmaster, Storagemaster, Classic and retail chests are intended for pushing or pulling by hand when the box is in use. They also will support the weight of the empty unit when you are manually lifting one out of a trailer or container after shipping. These side handles are intended for manual lifting and should never be used with a mechanical device such as a crane. So, the answer as to how much weight will they hold vertically is “how much weight can one person lift?” Realistically? About 200 pounds safely but it depends on the person. If the user wishes to hoist the box using a crane they will need to NOT use these side handles but instead either support the box from underneath or utilize the model #497 crane lift kit.
Answered by: Werner Customer Care
Date published: 2017-02-14

Does this box have a unique serial number?

Asked by: Anonymous
No the 89 box would have a standard serial number.
Answered by: Werner Customer Care
Date published: 2015-04-23

what model number of lock (american or master) to use on model 89 storagemaster Piano Box 47.8 cu ft

Asked by: Anonymous
For this we recommend American lock #50, or Masterlock #1 or #5.
Answered by: Werner Customer Care
Date published: 2016-10-05

How much match das cost its model 89

Model 89 STORAGEMASTER® Piano Box, 47.8 cu ft
Asked by: Anonymous
We do not sell directly. In order to get a cost on the 89 box please visit one of our distributors. To find a listing of distributors in your area please visit www.knaack.com.
Answered by: Werner Customer Care
Date published: 2016-02-27

Can you confirm that this job box can be locked up with pad locks.

Asked by: Anonymous
Yes, this box will lock with padlocks.
Answered by: Werner Customer Care
Date published: 2016-11-17

Model 89

I have a Model 89 and I ordered new casters, but the model I have , the casters have bolts in them and the area they screw into is totally enclosed, not open . So what size bolts do I need , since there is no way to put a washer or a nut on the new casters ?
Asked by: Anonymous
Please contact our Customer Care Department when convenient at 888-523-3370 Monday through Friday 8 AM till 5 PM EST for further details on your issue and/or question.
Answered by: Werner Customer Care
Date published: 2016-01-20
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