Reason Statement for Changes to ASTM E 455:
1.\tSection 1.1 was revised to emphasize the scope of the standard applies to the shear-resisting diaphragm web, not other diaphragm elements such as chords.
2.\tAdd Section 3.2 with a definition for diaphragm. This definition is based on ICC-ES AC43.
3.\tAdd and revise terminology in Section 3.3 to coordinate better with rest of the standard.
4.\tRevise Section 4.0 to characterize the diaphragms in greater detail.
5.\tAdd bearing reaction type cantilever frames to Section 188.8.131.52; and designate current cantilever frames as pinned reaction types in Section 184.108.40.206. This is prompted by frames currently available with these characteristics.
6.\tTo better estimate influence of intermediate joints and attachments, increase the number of diaphragm elements from four to five and increase the minimum dimension to 12 feet in Sections 220.127.116.11; and increase the number of diaphragm elements from four to six in Section 18.104.22.168. This change is based on reexamination of historical data on steel deck diaphragm testing.
7.\tAdd Note 2 discussing the need to minimize out of plane movement, as shown in Section 9.2.
8.\tAs loads at reactions cannot be measured readily, i.e., how are loads and deformations measured at hinge, loading and stiffness calculations are accomplished using the applied load Pu. Means to adjust Pu based on frame stiffness are more clearly described, in Sections 10.1.1 and 10.1.2.2.
9.\tAdd procedures for determining deformation for setup shown in Figure 5, in Section 10.1.2.1.
10.\tIntroduce fixed point for determining shear stiffness, G , based on 0.4 Pu. in Section 10.1.2.2.
11.\tMany editorial revisions throughout.
12.\t Delete Table 1 as the information is superfluous to the test method.
13.\t Revise Figures 2 and 3 to make deformation measuring device locations consistent with Section 10.
14.\t Include additional configurations for cantilever testing: bearing reaction in Section 22.214.171.124 and Figure 3.
15.\tAdd centerline deformation measurement location to Figure 4, as information on the peak deformation is often needed.
16.\tInclude additional means to measure deformation of cantilever testing: Figure 5.
connections; framed floor; roof diaphragm; static shear;
Citing ASTM Standards
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