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 8 & 10-Diamond Load Tables |
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 s width
increases, grating strut flexure becomes much more important. Eight and 10-Diamond
products are wide enough to require a change in the assumption used to prepare the
2-through 5-Diamond Product Selection/Design Tables. No longer will it be assumed
that both side channels are equally effective in supporting a concentrated load. In
fact, to provide a high level of safety, one side channel will be required to carry 100%
of a concentrated load. |
| Also strut deflection for 8-and
10-Diamond products may be significant. The most critical case occurs when a
concentrated load is located at mid-span and mid-width. To determine how the struts
perform under this loading, 3-ft. long samples of each material and thickness were
tested. For these tests the side channels were continuously supported and loads were
applied using a 1-ft. long and 1-in. wide bar placed parallel to the side channels at
mid-width and at the longitudinal center. |
| Results of these tests, included in the 8-and
10-Diamond Product Design Tables, proved the performance of these materials when a
concentrated load is applied at mid-width at the end of a plank, consult the strut
loading table ( 8-Diamond Strut Loading
and 10-Diamond
Strut Loading). |
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| The following values have been tabulated for 8-and 10-Diamond Grating: |
ALLOWABLE UNIFORM LOAD (U)- Values are given in the rows labeled "U" and are the lowest of the (1) maximum allowable uniform loads considering channel flexure, and (2) maximum grating surface flexure. |
DEFLECTION CORRESPONDING TO "U"- Deflection values appear to the rows labeled "D", below the "U" values, and are maximum deflections the allowable uniform loads would produce. Maximum deflections will occur at mid-span and mid-width and will be the sum of side channel and grating surface deflections. (Fig.3). |
ALLOWABLE CONCENTRATED LOAD (C)- Values tabulated in the rows labeled "C", are the lowest of the (1) maximum allowable concentrated load considering side channel flexure (with one side channel supporting the entire load- Fig.2), and (2) the maximum allowable strut flexure (Fig.1). |
DEFLECTION CORRESPONDING TO "C"- Deflection values are indicated below the "C" values in the table and are deflections the allowable concentrated loads will produce at mid-span and at mid-width. The deflection is the sum of side channel and grating surface deflections. |
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| 3-FT. LONG SAMPLE 10 DIAMONDS WIDE | ||
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