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TECHNICAL BULLETIN <br /> SIMPSON <br /> Code-Compliant Guardrail Post Connections Strong-Tie <br /> The railing connection is a crucial deck connection,and it is often t s'- <br /> inadequately constructed. In order to provide the required load <br /> resistance at the hand rail,the post must not only be fastened to the b . <br /> rim joist, but also be tied back into the joist framing. Machine bolts or 1, , .' <br /> lag screws through the post and rim joist alone do not typically meet t <br /> the performance requirements of the building code. <br /> • <br /> t The details on page 2 show various <br /> methods by which the guardrail post <br /> } ° {( connection can be made using either <br /> .^'» the Simpson Strong Tie®DTT2 deck <br /> .N. tension tie or HD3BHDG holdown. <br /> `. These details allow for a connection <br /> J \ to the deck framing at the joists or <br /> blocking.All details meet the IRC <br /> code-required load at a maximum , • <br /> 1 <br /> guardrail height of 36"above the F <br /> deck surface in an outward direction. „ - <br /> I r-••41°.• Details on page 3 meet the IBC code t` "` • <br /> 45-2, •�` _1) requirements for a one-or two-family • <br /> ol f \ ' dwelling at a maximum guardrail • a <br /> !r` frl height of 42"above the deck surface . 5 `•Q •w'Y <br /> in an outward direction. •, ` " <br /> DTT2Z <: ',* ' <br /> (DTT2SS similar) _ <br /> The DTT2 deck tension tie was designed to satisfy code requirements for guardrail-post connections in wood decks. <br /> Versatile and cost-effective,the DTT2 installs using Simpson Strong-Tie Strong-Drive®SDS screws which install with no <br /> predrilling and are included with each connector. <br /> Material/Finish: DTT2Z — 14 ga.carbon steel with ZMAX®galvanized coating <br /> DTT2SS — 14 ga.Type 316 stainless steel <br /> Fasteners(Included): DTT2Z — (8)Strong-Drive SDS screws, double-barrier coating <br /> DTT2SS — (8)Strong-Drive SDS screws,Type 316 stainless steel <br /> Installation: <br /> • Use all specified fasteners.Refer to the General Notes in This product is available with additional corrosion protection. <br /> the current Wood Construction Connectors catalog for <br /> additional important information. Model Anchor <br /> Diameter Fasteners <br /> • The supplied cut washer must be installed between the No. (1n) (in) '�""{"- <br /> nut and the seat. <br /> • SDS screws install best with a low speed,high torque a) DTT2 13/s 1/2 (8)'/a"x 1'/z"SDS ,...,-, ' <br /> drill with a 3/4"hex driver. 1.The information shown in this table is applicable to <br /> both the DTT2Z and DTT2SS. ;./;` <br /> The HD3BHDG has also been evaluated as a lateral anchor for "`( )'-h` <br /> the guardrail post and installs using 3/4"-diameter machine bolts. Anchor <br /> Model C Diameter Machine Bolts , <br /> Finish: Hot-dip galvanized No. (in.) (in.) <br /> Installation: R. <br /> HD3BHDG 15/1s % (2)%"dia. <br /> • Use all specified fasteners.Refer to the General Notes in the <br /> current Wood Construction Connectors catalog for additional <br /> important information. <br /> • Bolt holes shall be a minimum of'hz"to a maximum of -SS <br /> 'As"larger than the bolt diameter(per NDS section 11.1.2). <br /> • A washer is not required between the base plate of the HD3BHDG <br /> holdown and the anchor nut. <br /> 15\ "rQ ©2017 Simpson Strong-Tie Company Inc.T-C-GRDRLPST17 <br />