AT 2′ 0″ & 3′ 0″ PANEL SPANS. IN ACCORDANCE WITH ASTM E AND AISI S TESTED FOR: Central States Manufacturing, Inc. Find the most up-to-date version of ASTM E at Engineering Designation: E – 04Standard Test Method for Static Load Testing of Framed Floor or Roof Diaphragm Constructions for Buil.
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Waltz and Dolan justify the 24xft dimensions based on the benchmark testing by Countrymanwhich used similar size, aspect ratio, and boundary conditions. Already Subscribed to this document. You can download and open this file to ee455 own computer but DRM prevents opening this file on another computer, including a networked server.
Even with I-joist materials taken as being a constant between tests, use of low specific gravity blocking material 0. If the document is revised or amended, you will be notified by email.
In summary, the AC14 proposed revisions to required specimen dimensions and numbers of tests need further study and open discussion before the ES Committee can make a rational assessment. A diaphragm construction is an assembly of materials designed to transmit shear forces in the plane of the construction.
This makes sheathing-toframing attachment a critical element ee455 often defines shear capacity of the assembly. The impact of the proposed revisions proposed in Section 2. Respiratory System completed notes. In reality, the proprietary fastener performed about the same as the smaller diameter ring shank nail. Illustration of test setup 24 x 24 ft.
AC14-0611-R1 #4 – ICC-ES
The original rationalizations for these tables were based on an analysis of sheathing and attachment schedules for lumber-framed diaphragms with plywood panel sheathing. We have no amendments or corrections for this standard. The large relative movement between panel edges creates r455 tension perpendicular-to-grain splitting force across the framing at the fasteners for adjacent panels.
Revise and clarify 2. Summer International Code Council. The proposal, as written, requires the testing of each case configuration as tested unless a Case 5 configuration is tested. Abdomen-Part 3 – kylethornton.
ACR1 #4 – ICC-ES
The designer should be cautious when specifying proprietary fasteners that claim diaphragm performance improvements that have not been verified against all failure modes possible in a full-scale diaphragm. Joists provide out-ofplane stiffening and load transfer between astmm panel sheathing elements. Tables, like IBC Table Line 17 provides a similar comparison for a proprietary fastener that claims superior diaphragm performance for some configurations based atsm small-scale fastener testing and analysis.
At loads in excess of design loads, visible Summer relative movement can be observed between adjacent sheathing panels and between panels and framing. Stiffness Observations In some cases, a designer will also need to predict diaphragm deformation. Subscription pricing is determined by: For specific 4e55 statements, see Section 6.
The Line 6 comparison illustrates what a relatively subtle difference in I-joist product composition can have on capacity. The wall plates have a moment of inertia that is greater than a 2×12 rim board in the plane of bending and also act to constrain the rotation of boundary sheathing panels.
Research and Testing – Central States Mfg, Inc.
National Design Specification for Wood Construction. Original I-joist framing products used laminated veneer lumber LVL or sawn lumber flanges with thicknesses of 1.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. The full-scale diaphragm test program shall include the following minimum elements: A primary function of a light-frame floor or roof is to serve as a diaphragm that collects lateral load and transfers it to the shear walls and foundation.
Bibliography on Lumber and Wood Panel Diaphragms. ACR1 Page 4 of 4.
Special Design Provisions for Wind and Seismic. It is not intuitively obvious that they are all equal when it comes to I-joist diaphragm performance. Diaphragm design provisions for light-frame wood construction have been successfully employed for decades and were originally developed for lumber framing.
In the s, Johnson and others at Oregon State University specifically examined the effect of diaphragm scale. Ultimately, the analyst has to interpret limited pairwise comparisons with few degrees of freedom.