MIL-N-58106
4.6.1.2 Net Assy, Part No's. 6018-5 and 6018-10. Application of the proof
loads shall be by placing appropriately dense weights within the net load zone
as defined in Section 3, Cotton duck cloth (6-12 OZ) or equivalent, may be
placed between the weights and net mesh to aid in equalizing load pressure and
reduce sharp edge abrasion from the weights. The load shall be lifted slowly
and held free of ground for 5 minutes.
4.6.1.3 Mesh Cord and Border Cord. The cord shall be tested as mesh/lifting
leg assemblies per Section 3. Load application shall be as in paragraph 4.6.2.2.
4.6.2 Ultimate Load. Ultimate load requirements are given in Table 1,
Section 3. No failures are permitted.
4.6.2.1 Metalware. The apex fitting and hook shall be loaded until de-
struction occurs. The metalware shall be tested separate from the mesh/lifting
leg assembly. Load application shall be per Drawings 6019 and 6020.
4.6.2.2 Mesh/Lifting Leg Assembly. The net metalware shall not be included
in the mesh assembly ultimate load strength test. Suitable metalware shall be
substituted. Load application shall be per paragraph 4.6.1.2 and in accordance
with the following schedule:
LOAD INCREMENT
10,000 lb
5,000 lb
Net Capacity (lb)
Net Capacity (lb)
29,000
14,500
Start
70,000
2nd Lift
30,000
80,000
40,000
3rd Lift
90,000
50,000
4th Lift (Ultimate Loads)
The load shall be held free of ground for 5 minutes at each load level. At
ultimate load, there shall be no loss of load through the net. The mesh border
and lifting leg shall not fail. Individual mesh cords may fail, but no cascade
of adjacent mesh cord failures shall occur. Loads at failure shall be recorded.
Loading in excess of ultimate loads to destruction is not required.
4.6.3 Net Repairability Test. One each capacity net, after proof load
testing per paragraph 4.6.1, shall be subjected to destruct damage to the fabric
parts (i.e., torn, complete severance, abrasion to the mesh intersection, border
cord and lifting legs) prior to testing for repairability.
4.6.3.1 The repairability of the damaged net shall be demonstrated during
First Article evaluation by using the Net Repair criteria of Drawing 6022 and
para 3.5.
4.6.3.2 Each capacity net shall be strength tested in accordance with
paragraphs 4.6.1 and 4.6.2 (see note 6.1.8).
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