We use cookies on this site to enhance your user experience. By clicking "I AGREE" below, you are giving your consent for us to set cookies. Privacy Policy

text.skipToContent text.skipToNavigation

ATUD/TUD Take-Up Device

ATUD/TUD

On This Page

Strong-Rod® URS Components

This product's information may differ depending on the category of use. You are currently viewing details related to Strong-Rod® URS Components. You can also view product information related to the category: Strong-Rod® ATS Components

The ATUD and TUD expanding take-up devices are suitable for rod diameters from 1/2 " up to 1 3/4 " and shrinkage up to 3". Expanding screw-style take-up devices provide the lowest device displacements. For installation, ensure that the activation pin is pointing up and facing toward the inside of the building space. The pin can be pulled anytime after the nut has been tightened onto the top bearing plate and must be pulled by the time the building is fully loaded. Shrinkwrap should remain on the device until the pin is ready to be pulled. Before activating an ATUD make sure the pin on the take-up device on the floor below has been pulled.

Key Features

ATUD Features

  • Easy to install
  • Lowest device deflection
  • Fits up to 1-3/4 inch diameter rods

TUD Features

  • Easy to install
  • Lowest device deflection
  • Coated for corrosion protection and lubricity
  • Fits up to 1-1/4 inch diameter rods

Material

ATUD—ASTM B221 6061-T6511 Aluminum; TUD—ASTM A311 Class B, Grade 1144

Finish

ATUD—None; TUD—Corrosion Resistant Finish

Installation

  1. Install the specified bearing plate over the threaded rod onto the bottom plate of the wall.
  2. Install ATUD/TUD, with either end up, over the threaded rod and onto the bearing plate with the activation pin facing out.
  3. Install specified plate washer and then nut on top.
  4. Finger-tighten nut plus an additional 1/3- to 1/2-turn with a wrench.
  5. Remove shrink wrap from ATUD/TUD.
    IMPORTANT: Do not remove activation pin until nut is installed.
  6. Remove activation pin.

Related Literature

Strong-Rod™ Systems Seismic and Wind Restraint Systems Guide
F-L-SRS18
A design guide explaining how to specify Strong-Rod anchor tiedown system for shearwall overturning restraint and uplift restraint systems for roofs.
Catalog
Strong-Rod™ Systems Seismic and Wind Anchor Tiedown System Guide
C-L-SRSCAN18
Canadian limit states design catalogue for Strong-Rod™ Anchor Tiedown Systems. Includes product information, design methods, and pre-engineered runs using shrinkage compensation and other components.
Catalog
Systèmes Strong-Rod™ GUIDE POUR SYSTÈME D'ANCRAGE CONTRE LES SÉISMES ET LE VENT
C-L-SRSCAN18CF
Catalogue Calcul aux états limites canadiens des systèmes Strong-Rod™. Comprend info sur les produits, méthodes de calcul et séries précalculées utilisant compensation du retrait et autres composants.
Catalog
Connectors and Fasteners for Mass Timber Construction Catalog
C-C-MASSTIMBER20
A catalog featuring connectors and fasteners for mass timber construction solutions.
Catalog
Installation Guide for Simpson Strong-Tie® Take-Up Devices
T-L-TUDINSTLL20
A technical bulletin providing technical information on the installation of take-up devices with raised-floor shearwalls and holdowns.
Technical Bulletin

Load Tables

MODEL
NUMBER		 MAXIMUM
THREADED ROD
DIAMETER
(in.)		 DIMENSIONS RATED
COMPENSATION
CAPACITY
(in.)		 ALLOWABLE
LOADS1, 2
(lbs.)

SEATING
INCREMENT, ΔR3
(in.)

 DEFLECTION AT
ALLOWABLE LOAD, ΔA3
(in.)		 BEARING PLATE ABOVE ATUD/TUD BEARING PLATE BELOW ATUD/TUD USED IN ATS/URS
W
(in.)		 L
(in.)
TUD9 1 1/8 2 1/8 2 1/4 1 34,655 0.001 0.014 BP PL9 ATS
TUD10 1 1/4 2 3/8 2 1/4 1 45,400 0.001 0.033 BP PL10 ATS
ATUD5 5/8 1 3/8 1 7/8 3/4 6,565 0.001 0.009 LBP PL5 ATS/URS
ATUD6-2 3/4 1 3/4 3 1/8 2 11,430 0.004 0.022 BP PL5/PL6 ATS/URS
ATUD9 1 1/8 2 1/8 2 1/4 1 15,560 0.002 0.013 BP PL9 ATS
ATUD9-2 1 1/8 2 1/8 3 7/8 2 12,790 0.002 0.037 BP PL9 ATS
ATUD14 1 3/4 2 7/8 2 1/4 3/4 24,395 0.005 0.015 BP PL14 ATS
  1. Allowable compression capacities are for TUD only and are based on ICC-ES ESR-2320.
  2. No further steel stress increase allowed.
  3. Total device deflection = ΔT=ΔR+ΔA(PD/PC)

    PD = Demand Load
    PC = Allowable Loads from table

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT