Page 12 of Wood Construction Connectors 2006 Catalog by Simpson Strong-Tie

Model No. W L H Nails Allowable Loads (133) and (160) D Code Ref. own (100) Uplift F1 F2 EPB44A 3 3 2 8-16d 1100 815 935 2670 EPB44 3 3 2 8-16d 800 985 1135 3465 2, 40, 121 2, 40, 82, 121 EPB46 5 3 3 8-16d 800 985 1135 3465 EPB66 5 5 3 12-16d 1500 985 1135 3465 13 Wood Construction Connectors HOW TO USE THIS CATALOG STEEL STRESS INCREASE Recent changes in building codes and standards have affected the way allowable loads on some connectors are determined when using Allowable Stress Design. Building codes and material standards have traditionally allowed designers and manufacturers to take a one-third stress increase on the calculated design capacities of some building materials and components when designing for forces generated from wind and seismic events. Specifically, the codes allowed Simpson Strong-Tie to take a one-third stress increase on the calculated tensile capacity of steel connectors. Newer codes and standards only allow steel stress increase when using an alternate set of load combinations. For example, the International Building Code and Uniform Building Code do not allow a stress increase when designing with the Basic load combinations of Allowable Stress Design. However, these codes do allow the use of a stress increase when using the Alternate (or Alternative) basic load combinations, as long as the referenced material standard/section permits it. The ASCE7 Standards do not have Alternate basic load combinations, so stress increases are not permitted. Simpson Strong-Tie determines allowable loads in accordance with building codes and steel design standards (AISI and AISC). In the past, these steel standards have permitted the use of a one-third stress increase when designing for wind and seismic forces. However, the latest editions of these standards have discontinued that practice. Because of these changes, Simpson Strong-Tie re-evaluated its entire product line to determine which loads were governed by calculated steel strength and included an allowable stress increase on the steel. The majority of Simpson Strong-Ties products were not affected, since their allowable load is governed Load Combination Cd (Wood) Allowed 2000 International Building Code Code 2003 International Building Code 1997 Uniform Building Code Stress Increase (Steel) Allowed Basic ASCE 7-05, ASCE7-02 No Yes Basic No Yes Alternate Yes Yes Basic No Yes Alternate No Yes Basic No Yes Alternate Yes Yes Florida Building Code 2004 Basic No Yes Alternate No Yes OTHER CATALOG DEFINITIONS Deflection: The distance a point moves when a load is applied. Model No.: This is the Simpson product name. Uplift Down Lateral Dimensions W, L, H: This shows the product dimensions (width, length and height in this case.) The product drawing includes these callouts as a cross-reference. Nails: This shows the fastener quantity and type required to achieve the table loads. Throughout this catalog a footnote will typically be provided indicating the required nail diameter and length. All installations should be designed only in accordance with the allowable load values set forth in this catalog. NAILS: 16d 0.162" dia. x 3 long. See page 16-17 for other nail sizes and information. HOW WE DETERMINE ALLOWABLE LOADS NEW PRODUCTS New products are shown with the symbol. There are also many new sizes within existing model series. CHANGES IN RED Significant changes from last years catalog are indicated in red. Extra Corrosion Protection This icon identifies products that are available with additional corrosion protection (ZMAX, Hot-Dip Galvanized or Stainless Steel). Check with factory. The end of the product name will indicate what type of extra corrosion protection is provided (Z ZMAX, HDG Hot-Dip Galvanized or SS Stainless Steel). See page 6-7 for information on corrosion, and visit our website www.strongtie.com/info for more technical information on this topic. SIMPSON SPEC This icon indicates a product that is preferable to similar connectors because of a) easier installation, b) higher loads, c) lower installed cost, or a combination of these features. Code Ref: See page 12 for the Code Listing Key Chart, to determine which code reports include this product. Allowable loads in this catalog are determined using calculations and/or one or more of the following methods: a minimum of 3 static load tests in wood assemblies; a minimum of 3 static load tests in steel jigs; a minimum of 3 static load tests of products embedded in concrete or masonry. Some tests include only portions of a product such as purlin anchor tests only the embedded hook is tested, not the nailed or bolted section of the strap, which is calculated. Testing to determine allowable loads in this catalog is not done on connection systems in buildings. Testing is conducted under the supervision of an independent laboratory. Typically the allowable load is limited to the lowest of deflection, test ultimate/3 or calculation value. For detailed information regarding how Simpson tests specific products, contact Simpson. by a tested value, not a calculated value. Those products which were affected are shown with their revised capacities with no steel stress increase. Additionally, it must be clarified that the load duration factors for wood permitted by the National Design Specification for Wood Construction are separate and distinct from the one-third stress increase. Load duration factors for wood are permitted to be used in design calculations for all load combinations in the codes and standards covered by this catalog. For that reason there will be loads listed that include a load duration increase for wood or fasteners in wood, such as 1.33 or 1.6 for wind or seismic loading, with no further stress increase permitted. The table below summarizes when stress increases are permitted. Allowable Design Loads: The maximum load that a connection is designed to provide. There may be multiple design loads acting in different directions (up, down, lateral, perpendicular, etc.) imposed on a connection.

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