ATUD/TUD Take-Up Device
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Strong-Rod® URS Components
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Product Details
The ATUD and TUD expanding take-up devices are suitable for rod diameters from 1/2" up to 2" 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.
The ATUD and TUD are now rated as UL-qualified through-penetration firestop systems. The devices received F (flame) and T (temperature) ratings per ASTM E814 when they are installed in conjunction with the Simpson Strong-Tie BPRTUD steel bearing plate (RTUD) or the PL steel bearing plate with top plate and nut (ATUD and TUD), eliminating the need for additional fire resistance material at the hole in the plate.
Key Features
ATUD Features
- Easy to install
- Lowest device deflection
- Fits up to 2" diameter rods
TUD Features
- Easy to install
- Lowest device deflection
- Coated for corrosion protection and lubricity
- Fits up to 1-1/4" diameter rods
Material
- ATUD — ASTM B221 6061-T6511 aluminum; TUD — ASTM A311 Class B, Grade 1144
Finish
- ATUD — none; TUD — corrosion resistant finish
Installation
- Install the specified bearing plate over the threaded rod onto the bottom plate of the wall.
- Install ATUD/TUD, with either end up, over the threaded rod and onto the bearing plate with the activation pin facing out.
- Install specified plate washer and then nut on top.
- Finger-tighten nut plus an additional 1/3- to 1/2-turn with a wrench.
- Remove shrink wrap from ATUD/TUD.
IMPORTANT: Do not remove activation pin until nut is installed. - Remove activation pin.
Related Links
Related Literature
Load Tables
ATUD/TUD Models
- Allowable compression capacities are for TUD or ATUD only and are based on ICC-ES ESR-2320.
- No further increase in allowable load is permitted.
- Total device deflection = ΔT = ΔR + ΔA(PD/PA), where PD = Demand Load; PA = Allowable Load.
- For cases where the ATUD14-1 bears on a PL16, the smallest diameter threaded rod that should be used with this device is a 1 1/4". If bearing on a PL14, use the ATUD14-2 compatibility.
Fire Rating
- The F-rating criteria prohibits flame passage through the system and requires acceptable hose-stream test performance.
- The T-rating criteria prohibits flame passage through the system and requires the maximum temperature rise on the unexposed surface of the wall or floor assembly, on the penetrating item and on the fill material not to exceed 325°F above ambient, and requires acceptable hose-stream test performance.
- The L-rating criteria determines the amount of air leakage in cubic feet per minute per square foot of opening (CFM/sq.ft.) or in cubic feet per minute per unit (CFM/unit) for fixed-size opening units, through the firestop system at ambient and /or 400°F air temperatures at an air-pressure differential of 0.011 psi. L-rating listed is for both ambient temperature and at 400°F.
Code Reports & Compliance
Drawings
| DWG | DXF | RFA | IFC | SAT | |||
|---|---|---|---|---|---|---|---|