ASD/LRFD Manual - American Wood Council
ASD/LRFD Manual - American Wood Council
ASD/LRFD Manual - American Wood Council
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90 M12: SPLIT RING AND SHEAR PLATE CONNECTORS<br />
M12.1 General<br />
This Chapter covers design for split rings and shear<br />
plates. These connectors rely on their geometry to provide<br />
larger metal-to-wood bearing areas per connector. Both are<br />
installed into precut grooves or daps in the members.<br />
M12.2 Reference Design Values<br />
Reference lateral design values (P, Q) are tabulated in<br />
the split ring and shear plate tables in NDS 12.2.<br />
Design Adjustment Factors<br />
10.3.1 provides all applicable adjustment factors for split<br />
ring and shear plate connectors. Table M12.2-1 shows the<br />
applicability of adjustment factors for dowel-type fasteners<br />
in a slightly different format for the designer.<br />
Split ring and shear plate connections must be designed<br />
by applying all applicable adjustment factors to the reference<br />
lateral design value for the connection. NDS Table<br />
Table M12.2-1<br />
Applicability of Adjustment Factors for Split Ring and Shear<br />
Plate Connectors 1<br />
Split Ring and<br />
Shear Plate Connectors<br />
Allowable Stress Design Load and Resistance Factor Design<br />
P′ = P C D C M C t C g C ∆ C d C st P′ = P C M C t C g C ∆ C d C st K F φ z λ<br />
Q′ = Q C D C M C t C g C ∆ C d Q′ = Q C M C t C g C ∆ C d K F φ z λ<br />
1. See NDS Table 10.3.1 footnotes for additional guidance on application of adjustment factors for split ring and shear plate connectors.<br />
For a single split ring or shear plate connection installed<br />
in side grain perpendicular to the length of the wood<br />
members, meeting the end and edge distance and spacing<br />
requirements of NDS 12.3, used in a normal building environment<br />
(meeting the reference conditions of NDS 2.3 and<br />
10.3), and meeting the penetration requirements of NDS<br />
12.2.3, the general equations for P′ and Q′ reduce to:<br />
for <strong>ASD</strong>:<br />
P′ = P C D<br />
Q′ = Q C D<br />
for <strong>LRFD</strong>:<br />
P′ = P K F φ z λ<br />
Q′ = Q K F φ z λ<br />
M12.3 Placement of Split Ring and Shear Plate<br />
Connectors<br />
Installation Requirements<br />
To achieve stated design values, connectors must<br />
comply with installation requirements such as spacing<br />
of connectors, minimum edge and end distances, proper<br />
dapping and grooving, drilling of lead holes, and minimum<br />
fastener penetration as specified in NDS 12.3.<br />
<strong>American</strong> <strong>Wood</strong> <strong>Council</strong>
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