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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Shear flow causes panels at the reactions to rotate in opposite directions towards the span centerline.
This highlights the importance for the manufacturer to evaluate a configuration that encourages realistic stress flows through the system if design values are being developed. ACR1 Page 2 of 4 wood-frame structure conducted in the summer ofno diaphragm failures or distress was observed even though the building experienced a Xstm.
This test method will help determine structural diaphragm properties needed for design purposes.
Standards Subsctiption may be the perfect solution. These thicknesses were consistent with 2 in. Atm standard is also available to be included in Standards Subscriptions. Smart; Staff has proposed revisions to the requirements for diaphragm testing of thin-flange wood Ijoists and the subject has been placed on the agenda for the upcoming Criteria Development Hearing. The Case 5 condition is not a common case condition that is seen in the field. Page 4 Aztm 20, Thank you for this opportunity to comment on the proposed revision.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Summer International Code Council. A revision to the AC should specifically state that e4555 results of diaphragm tests are applicable to floor and roof diaphragms. Historical Version s – view previous versions of standard. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
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ACR1 #4 – ICC-ES
It is not intuitively obvious that they are all equal when it comes to I-joist diaphragm performance. In the s, Johnson and others at Oregon State University specifically examined the effect of diaphragm scale. The unsheathed diaphragm configuration used for the confirmation test shall be compared against the sheathed diaphragm with the lowest capacity in the test program.
For that reason ASTM E permits testing a single replication when multiple configurations are being evaluated. The designer should also aztm products that have been rationalized accordingly. One of the benefits of testing diaphragms with a 1: Thank you for your consideration of these comments and revisions.
The Case 1 diaphragms tested exhibited similar astn with the exception that panel bearing and crushing were also observed between interlocking panel rows. This makes sheathing-toframing attachment a critical element that often defines shear capacity of the assembly.
While extrapolations beyond tested conditions should be approached with caution, comparisons in Table 1 suggest trends that could be useful to sstm designer: Peak strength comparisons between similar full-scale diaphragm tests1, 2 3,4 Notes for Table 1: Even in the NDS seismic tests of the six-story Mr.
The work by Dolan and Waltz shows that the effect of size and aspect ratio seem immaterial to I-joist Mr.
At loads in excess of design loads, visible Summer relative movement can be observed between adjacent sheathing panels and between panels and framing. Bibliography on Lumber and Wood Panel Diaphragms. Synopsis — What do we know about the fundamentals of testing wood-frame diaphragms?
As the voice of the U.
This analogy works well because we can manage engineering analysis using simple mechanics theory. Diaphragm design provisions for light-frame wood construction have been successfully employed for decades and were originally developed for lumber framing.
No mention is made of roof diaphragms and whether the testing for floor diaphragms is applicable to roofs flat or pitched. Revise, expand, and clarify 2. For astk, avoid using spruce-pine-fir blocking if Douglas-fir diaphragm design values are targeted.
Regardless, it highlights that an I-joist manufacturer needs to evaluate the diaphragm performance of each primary species axtm for flange material.
Abstract Pre-fabricated wood I-joists are routinely used to construct roof and floor systems in modern lightframe wood construction. Calculation procedures developed for sawn lumber diaphragms also provide zstm reasonable means of predicting I-joist diaphragm deformation in the design range. Science Review Packet for Spring Exam. They generally do not permit 10 thinner flanged I-joist products to be used in the highest load applications that require the closest sheathing attachment schedules.
Diaphragm Design Diaphragms are typically r455 as deep, inplane beams. Eight penny 8d ring shank 0.
ASTM – E – Reapproved – Standard Method for Static Load Testing of Framed Floor or R
My comments focus on three aspects of the proposed revisions: Even with I-joist materials taken as being a constant between tests, use of low specific gravity blocking material ee455.
Blocking used in the field of the diaphragm and rim board material used for perpendicular closure shall be consistent with that permitted in the application. This article summarizes some of the rationalization and limitations associated with I-joist framing for diaphragm construction.
Manufacturers may be compelled to evaluate a proprietary joist, fastener, or asgm material in the Case 1 configuration in order to evaluate the failure mechanism of their product in its primary end-use condition.
Since the existing diaphragm design provisions contained within the model building codes are based on a combination of testing and analysis conducted with sawn lumber framing, designers asfm question whether they can be reasonably applied to diaphragms framed with I-joists. Smart, We have reviewed the proposed revisions to AC Joists provide out-ofplane stiffening and load transfer between discrete panel sheathing elements.