Holdowns & Tension Ties
Holdowns
SB
SB
SB
H
H
H
HB
HB
B
CL
W
B
W
SO
HD5B
1. To achieve published loads, machine bolts shall be installed with the nut on the opposite side of the holdown. If reversed, the Designer shall reduce the allowable loads shown per NDS requirements when bolt threads are in the shear plane. 2. Lag bolts will not develop the listed loads.
50
HD3B
W
(HD7B and HD9B similar) U.S. Patents 6,006,487; 6,327,831
HD19
(HD12 similar)
Minimum wood member thickness Washers must be installed between bolt nuts and wood See foonote 4
Hanger not shown
Horizontal HDB Installation (Plan View) Stand off provides minimum end distance to end of post from post bolt
Allowable Tension Loads (160) DF/SP 1895 2525 3130 3130 3750 4505 4935 6645 7310 7345 7740 9920 9920 10035 11350 12665 14220 11775 13335 15435 15510 16735 16775 19360 19070
SPF/HF 1610 2145 3050 3050 3190 3785 4195 5650 6215 6245 6580 8435 8430 8530 9215 10765 12085 9215 11055 13120 12690 14225 12690 15270 16210
Deflection at Highest Allowable Load 0.156 0.169 0.120 0.120 0.129 0.156 0.150 0.142 0.154 0.155 0.159 0.178 0.178 0.179 0.171 0.171 0.162 0.171 0.177 0.194 0.162 0.191 0.200 0.180 0.137
Code Ref.
Vertical HD19 Installation
Minimum wood member thickness Washers must be installed between bolt nuts and wood
IP3, F28, L21
HD3B Vertical Installation
C-C-2015 © 2015 SIMPSON STRONG-TIE COMPANY INC. PRINTED 12/14
These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.
Minimum Material Dimensions (in.) Fasteners Model Wood Anchor Stud Base Body No. Member HB SB W H B CL SO Dia. Bolts Thickness (in) Ga 1 1⁄2 2 1⁄2 5 HD3B — 12 4 3⁄4 2 1⁄2 2 1⁄2 8 5⁄8 2 1⁄4 1 5⁄16 3⁄8 ⁄8 2 - 5⁄8 3 3 1⁄2 2 1⁄2 5 HD5B 3⁄16 10 5 1⁄4 3 2 1⁄2 9 3⁄8 2 1⁄2 1 1⁄4 2 ⁄8 2 - 3⁄4 3 3 1⁄2 3 7 HD7B 3⁄16 10 5 1⁄4 3 2 1⁄2 12 3⁄8 2 1⁄2 1 1⁄4 2 ⁄8 3 - 3⁄4 3 1⁄2 4 1⁄2 3 1⁄2 4 1⁄2 7 HD9B 3⁄8 7 6 1⁄8 3 1⁄2 2 7⁄8 14 2 1⁄2 1 1⁄4 2 3⁄8 ⁄8 3 - 7⁄8 5 1⁄2 7 1⁄4 3 1⁄2 1 4-1 4 1⁄2 5 1⁄2 x5 1⁄2 3 1 5 1 1 5 3 1⁄2 HD12 ⁄8 3 7 4 3 ⁄2 20 ⁄16 4 ⁄4 2 ⁄8 3 ⁄8 1 4 ⁄2 1 1⁄8 4-1 7 1⁄4 5 1⁄2 x5 1⁄2 7 1⁄4 1 1⁄8 5-1 1 1 5 ⁄ 2 x5 ⁄2 HD19 3⁄8 3 7 4 3 1⁄2 24 1⁄2 4 1⁄4 2 1⁄8 3 5⁄8 1 7 ⁄ 4 1 1⁄4 5-1 5 1⁄2 x5 1⁄2
CL
HB
SO
B
Simpson Strong-Tie offers a wide variety of bolted holdowns offering low-deflection performance for a range of load requirements. The HD3B is a light-duty holdown designed for use in shearwalls and braced-wall panels, as well as other lateral applications. The HD5B, HD7B and HD9B bolted holdowns incorporate the proven design of our HDQ8 SDS-style holdown and feature a unique seat design which greatly minimizes deflection under load. HDB holdowns are self jigging, ensuring that the code-required minimum of seven bolt diameters from the end of the post is met. They can be installed directly on the sill plate or raised above it and are suitable for back-to-back applications where eccentricity is a concern. HDBs are designed to provide loads for intermediate-load-range shearwalls, braced-wall panels and lateral applications. HD holdowns offer the highest allowable loads, providing high capacity for both vertical and horizontal applications. The HD12 and HD19 are self jigging, ensuring that the code-required minimum of seven bolt diameters from the end of the post is met. They can be installed back-to-back when eccentricity is an issue. MATERIAL: See table FINISH: HD3B/HD5B/HD7B/HD9B – Galvanized; HD – Simpson Strong-Tie® gray paint INSTALLATION: • See General Notes on page 45. • Bolt holes shall be a minimum of 1⁄32" to a maximum of 1⁄16" larger than the bolt diameter (per 2012 NDS, section 11.1.3.2). • Stud bolts should be snugly tightened with standard cut washers between the wood and nut (BPs are required in the City and County of Los Angeles). • HD and HDB holdowns are self-jigging and will ensure minimum bolt end distance when installed flush with the sill plate. • Standard cut washer is required under the anchor nut for HD12 with 1" anchor and HD19 with 1⅛ anchors. CODES: See page 12 for Code Reference Key Chart.
CL
Holdowns & Tension Ties
HDB/HD