Not a mythical force - but two things perhaps. 1. No matching side nor top box is sold by HF/USG for the 56" and 2. Reading the Product manuals for both the 40" and 56" one notices they are quite different
The manual for the 40" states that it is designed to be used side by side with the side and top boxes listed.
The 40" 13 drawer manual shows:
1221 lbs capacity for the drawers
1673 lbs capacity for the Top Panel
total = 2894 lbs
The manual for the 56" shows
7 drawers x 154 lbs = 1078 lbs
4 drawers x 220 lbs = 880 lbs
Total = 1958 lbs.
It makes no mention of side nor top boxes - and in fact has the warning:
DO NOT EXCEED the 1958 lbs weight capacity. & Do not stand or climb on the cabinet
Maybe that is what gives people the impression that one should not hang additional weight on the 56".
FWIW,
Carl B.
This is a myth as shown here by MN4x4 in another thread.
**************************************************
I originally posted this in the 'HOT DEALS' thread, but I think it bears repeating here.
I have been wrestling with this comparison myself and researching this information, and I've found out that - while the Total Load Capacity quoted by HF is 1900 or so lbs for the 56" and 2900 or so lbs. for the 44" - it's not an apples-to-apples comparison. IN FACT, IT'S DOWNRIGHT MISLEADING!
I compared the boxes in the store, and it just didn't seem those numbers could be right. Well, it turns out that the 2900 lb rating for the 13 drawer box includes an allowance for 1473 pounds on the top of the cabinet (likely due to the availability of a matching top chest) while the 56" cabinet has no weight allowance listed for the top at all. This makes an "at-a-glance" comparison impossible.
I decided that the only fair comparison is to add up the weight capacity of each drawer...which I did. (If you'd like to research this on your own, simply download the manuals for each cabinet. All of the drawer weight info is in there. Also, I have used their alphabetical drawer designation, so if you want to know which drawer is which, well - download the manual.
So, without further ado, here is the accurate comparison:
44" 13 Drawer Cabinet
Drawer Qty Lbs Total
Drawer A 5 88 440
Drawer B 1 110 110
Drawer C 5 88 440
Drawer D 1 110 110
Drawer E 1 121 121
Total weight for all drawers - 1221 pounds
56" 11 Drawer Cabinet
Drawer Qty Lbs Total
Drawer A 1 220 220
Drawer B 2 154 308
Drawer C 1 154 154
Drawer D 1 220 220
Drawer E 1 220 220
Drawer F 1 154 154
Drawer G 2 154 308
Drawer H 1 154 154
Drawer I 1 220 220
Total weight for all drawers - 1958 pounds
What this says is that not only is the 56" cabinet capable of holding more weight, if you compare the two box sizes (44" to 56") the 56" cabinet is proportionally MUCH stronger. So much for that myth...
Obviously, weight will likely not be the ONLY consideration for most potential purchasers. Cabinet width, number of drawers, available accessories, and type of finish all come to mind.
Here is a link to the thread:
http://www.garagejournal.com/forum/showthread.php?t=115098&highlight=harbor+freight&showall=1
James