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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While this difference is within the margin of error for diaphragm testing the suggested revisions below recognize ast Case 5 may be the conservative configuration for blocked diaphragms. This is consistent with the code design provisions and can be attributed to the fact that wider framing tends to reduce splitting and can provide for increased edge distance and staggered nail patterns that provide better load transfer. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing aetm.
Due to panel geometry, the observed movement between adjacent sheathing panels is typically several times greater along long edge joints than at short 11 Figure 2. Initially, diaphragms deform elastically as a deep beam without perceptible relative movement between framing and sheathing. However, a diaphragm on a concrete foundation is not subject to those boundary conditions and even the boundary conditions of the framed second-floor diaphragm differs from the model in that the diaphragm is sitting on springs the shear walls rather than a pin and roller, and the end rotations are constrained by the supported walls.
It should be noted that the actual deformations are less than deformations predicted using the default apparent shear stiffness term in SDPWS. A diaphragm construction is an assembly of materials designed to transmit shear forces in the plane of the construction. Revise, expand, and clarify 2.
In general, the manufacturers have proven equivalence to a subset of the current diaphragm design tables for sawn lumber. Bibliography on Lumber and Wood Panel Diaphragms.
In reality, the proprietary fastener performed about the same as the smaller diameter ring shank nail. Any IBC Table Diaphragm Design Diaphragms are typically modeled as deep, inplane beams.
Lateral Tests on Plywood Sheathed Diaphragms. Therefore, consideration should be made to allow testing in the unblocked and unblocked Case 1 condition and allow the other appropriate cases be bracketed by that testing. Notes and footnotes in tables and figures are requirements of this standard. Ast large relative movement between panel edges creates a tension perpendicular-to-grain splitting force across the framing at the fasteners for adjacent panels.
Introduction Modern light-frame roof and floor systems routinely combine pre-fabricated wood I-joists with wood structural panel s455.
This highlights the importance of flange splitting and the need for the manufacturer to address the resulting capacity limitations in their design guidance. However, the performance of an I-joist diaphragm assembly will be dependent on the specific I-joist product used and its relevant attributes i. Your Alert Profile lists the documents that will e45 monitored.
A downside is that deflection measurements are small. A revision to the AC should specifically state that the results of diaphragm tests are applicable to floor and roof diaphragms. As with the last item, this would seem to confirm that diaphragm performance is product dependent. The unsheathed diaphragm configuration used for the confirmation test shall be compared against the sheathed diaphragm with the lowest capacity in the test program.
AC14-0611-R1 #4 – ICC-ES
Comparisons on Lines illustrate that, as with sawn lumber, wider framing results in increased capacity. As a result, I-joist diaphragm performance is enhanced to a point by using more smaller, ductile fasteners e4555 fewer bigger fasteners.
In the s, Johnson and others at Oregon State University specifically examined the effect of diaphragm scale. A diaphragm construction is an assembly of materials designed to transmit shear forces aatm the plane of the construction.
Manufacturers may be compelled to evaluate a proprietary joist, fastener, or sheathing material in the Case 1 configuration in order to evaluate the failure mechanism of their product in its primary end-use condition. These thicknesses were consistent with 2 in.
ASTM – E – Reapproved – Standard Method for Static Load Testing of Framed Floor or R
Original I-joist framing products used laminated veneer lumber LVL or sawn lumber flanges with thicknesses of 1. 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 often question whether they can be reasonably applied to diaphragms framed with I-joists.
For specific precautionary statements, see Section 6. Atm, only a single diaphragm was tested in the following cases: The values given in astj are for information only.
It also suggests that designers should avoid applying the diaphragm recommendations for one I-joist product to another. The governing joist material shall be selected for the test program.