Concentric Tension Systems

Model TRA-0750 · 3/4" stainless tension rod assembly · Made in the USA

Design your stainless tension rods

Set the pin-to-pin length, then choose a turnbuckle and conical nuts. The capacities are the same either way.

The assembly with a turnbuckle and conical nuts (rendering)
With the turnbuckle: two rods, 9 inches of adjustment in all (6 at the turnbuckle, 3 at the clevises).
The assembly without a turnbuckle (rendering)
Without: one rod, right-hand thread at one end and left-hand at the other, 3 inches of adjustment.

Specifications

ModelTRA-0750-174-T with the turnbuckle, TRA-0750-174-NT without
MaterialASTM A564 17-4 PH stainless steel (S17400), H1150 condition: clevises, clevis pins, rods and turnbuckle. 105 ksi minimum yield strength, 16% minimum elongation
Mill test reportsWith every order, for each heat of steel in it, showing where it was melted
Quality systemThreaded, assembled and inspected in our Santa Anna, Texas, shop, under a quality management system certified to ISO 9001:2015
Rod3/4" with 3/4-10 UNC threads, right-hand and left-hand; up to 20 ft per rod
Clevis pin7/8" diameter, held by two stainless retaining rings
Turnbuckle1-1/4" diameter, 8-1/4" long, with 1" wrench flats: just 1/8" proud of the rod across the flats, 1/4" at its widest
LRFD design strength33.86 kips
ASD allowable strength22.58 kips
Governing limit stateNet-section tensile rupture of the rod at the 3/4-10 thread (ANSI/AISC 370-21)
Length adjustment3" at the clevises, plus 6" at the turnbuckle: 9" in all with it, 3" without
Thread engagement1" minimum at every joint, marked on the rod so the installer can check it
Conical nutsOptional and decorative, outside the load path
MountingPinned to a plate your engineer designs to our grip plate requirements: 7/8" pin, 3/4" bearing thickness

In the box

  • Two clevises, one left-hand and one right-hand
  • Two 7/8" clevis pins with four retaining rings
  • The rod, cut to your length; or two rods and the turnbuckle
  • Conical nuts if you choose them: two, or four with the turnbuckle

To order

Give us the pin-to-pin length and the quantity for each run. The grip plates at each end are by others, designed by your project's engineer.

Limits

  • Static axial tension only. Bending, prying, eccentric or side loading isn't covered unless a licensed engineer evaluates it.
  • Dynamic, cyclic, seismic or impact loads must be converted to an equivalent static load by your engineer.
  • For dry and damp interiors and normal outdoor exposure. Marine, chloride-rich or chemically aggressive settings need your engineer's evaluation.
  • Installed only as drawn, with Loctite 243 on the rod threads. No machining, welding, drilling or heating, and no other pins or mountings.

The engineering behind these numbers

Reserve from the first production run

The first run is planned for spring 2027, and there's nothing to pay to reserve. We'll call to confirm your project, then quote with first-run pricing. Stamped drawings for a named project are on request.

Reserve or ask for drawings