The 8 pound test is all about capacity and recovery from extreme loading. It is not meant to be a recommended state-of-use, but rather a reference.

In the 8 pound test, the stands are at the absolute upper right corner of their maximum capacity in terms of stability, and you would not want to use them this way, as they are not unconditionally stable with this load.

There are only two microphones out there that weigh this much, the Classic RCA44 and the very nice AEA R44C reproduction of the RCA. It is unlikely that you would see these microphones on the road, but it is a reference.

We use a gallon of water (substituting for these microphones) as the test weight. A precisely measured gallon of water weighs 8.34 pounds at 62 degrees F, or 3.8kg at 17 degrees C. We round it down to 8 pounds or 3.62 kg.

 The stand/boom combination is taken to the limit of stability, and at that limit support the 8 pound weight and recover from the load without any bending or damage.

The stand tube extension locks must also support the combined weight of the load and the boom self-weight without slipping.

Yeah, OK, we're showing off.

 

 
   
This is a Surefoot Mid-Weight stand and boom supporting the gallon of water 22" beyond the vertical centerline of the stand, and 12" outside of the tip of the forward base leg. The boom is aligned with the forward leg.

The stand is comprised of a Longfoot base, with 1-1/4" (tapped for 1-1/8") and 7/8" standard wall tubes, and the boom is a Surefoot Black Max Midweight with 7/8" standard wall tube and a 5/8" thick wall tube.

The boom head can be pinned for heavy loads to absolutely assure that it does not slip, but pinning was not necessary with this load .

All of this from a stand/boom combination that weighs 12 lbs.

But that was not enough, so....

This shot added 25 pounds of additional base weight (a work box full of 5/8" truss bolts) and the boom was extended quite a bit.

Note the position of the boom in relation to the curb behind it, and the bow in the top stand section.

This is the boom/stand after the removal of the test load.

Again, compare the boom to the curb in the background.

Note that it has returned to normal shape without any permanent bending or deformation.

It was grunting hard, but never in any trouble.

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