Overhead Fastening

THD-Rod-Hanger_install.jpeg

The Simpson-Strongtie THD50234RH rod hanger for 1/2″ rod in concrete is an excellent atlernative for suspening 1/2″ threaded rod in overhead.  If you are dropping 1/2″ rod from concrete overhead for cable tray, fixtures or HVAC applications, this is an anchor you may want to check out.  You may be used to using 1/2″ drop in anchors, drilling a 5/8″ hole and then trying to hammer with the set tool overhead to set the anchor.  I have done it, not fun!  Watch the video on the Simpson THD50234RH rod hanger, it is super easy to install.  Just drill a 3/8″ hole to a minimum depth of 3″, blow the hole and drive in the hanger using an impact driver and a 11/16″ socket.  While the initial cost may be higher than a drop in anchor, you will easily make it up in time, especially when you drop the set tool and have to climb down the ladder and grab it, again.  It is safe to say, you tech’s cost you $1 a minute, likely more.  It won’t take much to recoop cost.

One of the originators of the overhead rod hanger fasteners was Sammy Screws.  While they offer a concrete rod hanger for 1/4″ and 3/8″ threaded rod, they do not have  choice for the 1/2″ rod.  The THD50234RH is desigend arount the tried and true Titen HD series of anchors.  Unlinke the Sammy Screws, you do not need a special driver, just an 11/16″ socket and your impact driver.  This is one of those anchors you may hesitate to try, again, the initial cost is higher, but once you try them, you will keep using them.  They really are much more user friendly!



I have sold and serviced many powder actuated tools over the last 20 years including the Hilti DX350 and the clone versions of the tool from many different manufacturers.  They are just such a solid tool with many different uses.   Here are a few points to help you find a good deal on a good used Hilti DX350.  Don’t just accept the statement that the tool fires or works well.  I have seen tools advertised as working well when they were obviously missing parts in the photos. The tool will handle pins from 1/2″ to 2-1/2″ with washer making it a perfect choice for all around general contractors.  As it can be mounted to an extension, it is also a great choice for electricians, ceiling contractors and data comm/low voltage work.  The only use I don’t like the tool for is tasks that are prone to over driving the tool like  putting foam to concrete.  Check us out for pins and loads for the Hilti DX-350.

A Hilti DX350 tool should not just fire, it should fire solidly and advance one load each time you cycle the tool.  The most common thing a used tool may need is a piston or driver.  The piston or driver is what forces the pin into the concrete.  They are a wear part and so they chip up and can even break.  An aftermarket piston to fit the Hilti DX350 goes for around $30.  The driver is easy to replace.  If the tool isn’t advancing the load advance isn’t expensive, but it is a little more tricky to replace.   The little “C” clip that holds the front barrel together can get bent up from time to time.  Again this is a wear part, easy to replace and many of the tools have extra packed along with the tool.  Stay a way for a tool that has cracks or breaks on barrel or fastener guide.  If the tool fires and advances but make just a “poof” sound, almost like a bad load, it is likely the return pawl that reset the piston is warn.  Easy to replace but figure another $20 or so to fix.

When you are looking for a used Hilti DX350 tool you will find clone tools from Ramset, most notably the Cobra tool.  The Cobra is a great tool, but stay away from the Cobra Plus tools, many of the parts are not available.  As for prices, I have seen them all over the board but many good tools can be had for $100-$150 or so.  If you shop around you may find a tool with loads and pins to fit your application.  FYI the tool is a .27 caliber strip tool.  Loads are readily available at most big box stores.  The loads are color coded, going from the lowest, GREEN, YELLOW and then RED.  Start with the lowest power level and work up until you pin sets to correct depth.  Ramset, Simpson and Powers loads will work in the DX350 if they are .27 caliber strips.

Below are a few of the used Hilti DX350 tools available on ebay or click here for a more extensive search

DX-350 Extension

DX-350 Extension

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Construction Fastening Systems, Inc.

Specialty tools & fasteners for the trades.
952.230.7725Toll Free 1.877.212.2377

cfsdelivers.com

contact@cfsdelivers.com

Serving the entire U.S.

Based In Twin Cities, MN



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