Vertical Hanger, Steel

What a vertical hanger for steel is

Hobson describes its vertical hangers as a one-piece, self drilling fastening system for installation into steel, made for the suspension of threaded rod. One end is a self-drilling screw: 14 gauge, 20 threads per inch, 25mm long (L1 on Hobson's drawing) including its 5mm drill point, which is 9mm long. The other end is a body with a 16mm hex and an M10 internal thread, 15mm deep, that takes the threaded rod in line with the screw.

So the screw goes up into the underside of a steel member and the rod hangs straight down from it. Hobson lists it for hanging pipe, fire protection, electrical conduit and cable tray, and recommends steel 1.0 to 3.0mm thick. It is HEC carbon steel, zinc plated, and comes with a backing nut. Hobson publishes no fire rating for it: where a fire services design calls for rated hangers, use what the designer specifies.

Hobson's self-drilling screw identification sheet counts more than 16 threads per inch as a fine thread, so the 20 TPI screw thread on this hanger is a fine thread by Hobson's definition.

In-line or right angle, steel, timber or concrete?

• •Underside of a steel member, 1.0 to 3.0mm, rod straight below the screw: this in-line vertical hanger, M10 rod.
• •Vertical steel face, such as the web of a purlin or girt, 1.0 to 3.0mm: the right angle hanger, which holds M6, M8 or M10 rod at a right angle to the screw. Hobson publishes no values for the sideways rod load on that one; see its page.
• •Timber beams and joists: the self-drilling Type 17 hangers for timber, M10 rod.
• •Concrete ceilings and soffits: the XBolt vertical hanger (M10 rod, with Hobson working loads but no ETA, seismic or fire approval) or the XBolt PRO vertical hangers, with their own approvals and install values.

Dimensions

One size. Select the row to open it in the selector.

Pull-out values Hobson publishes, and every condition on them

Hobson's data sheet gives pull-out values for this hanger in G450 steel plate. Pull-out is a load straight along the screw, which on this in-line hanger is the direction the rod pulls when it hangs straight down from a horizontal steel face. The values apply only that way: Hobson gives none for a sideways or angled load.

They are laboratory values using Hobson product. Hobson notes that actual pull-out loads may differ with the properties of the base material and that safety factors should be considered for design. The sheet covers G450 plate from 1.0 to 2.5mm only, with nothing for 3.0mm (the top of its recommended range) or other steel grades, and gives no edge distance, end distance or spacing limits, so do not assume the values hold near the edge of a flange or close to other fixings. They are for the hanger's grip in the steel, not a rating for the steel member, the rod or the service. The load per hanger, the spacing and the layout are for the services designer or an engineer.

The sheet also gives the strength of the screw itself: torsional strength 17.6Nm, mean tensile 22,600N, mean shear 13,550N, characteristic tensile 21,000N and characteristic shear 12,600N. These are test values for the screw, not a hanging capacity.

How to install a vertical hanger in steel

1. Check the steel is within Hobson's recommended 1.0 to 3.0mm and that the load per hanger and the spacing come from your services design. You need access to the back of the steel to fit the backing nut; if you do not have it, ask us before choosing this hanger.
2. Fit a 16mm socket to a cordless impact driver, which Hobson recommends. Hobson's vertical hanger socket (MXSVS-SI, 1/4 inch drive, packs of 10) suits this hanger.
3. Drive the hanger up into the steel: the drill point drills the hole and the 14 gauge thread follows it in. Stop when the hanger is home.
4. From the far side, thread the supplied backing nut onto the screw point where it comes through the steel and tighten it (Hobson's installation picture 2). Hobson says the nut is supplied to lock the hanger in place once it has been installed, and should be used to ensure a secure installation.
5. Screw the M10 threaded rod into the body (15mm of internal thread) and hang the service from it.

Zinc plated: for dry, enclosed positions

The hanger is zinc plated (RoHS compliant). Hobson's finish comparison gives zinc plating about 5 microns with low corrosion resistance, recommended for indoor and non-corrosive environments, and Hobson's corrosion guide for metal connectors uses zinc plated only where the connector is enclosed in a very low or low corrosivity zone. That suits services hung inside a building. For sheltered or exposed positions, such as an open carport, a verandah or a coastal site, this finish is not the right choice: ask us for an alternative.

Vertical hangers for steel in Adelaide

Allmat supplies self-drilling hangers for steel and timber, XBolt PRO hangers for concrete, the sockets to drive them and threaded rod to electricians, plumbers, fire services and HVAC installers across Adelaide and South Australia. Add the hangers to a quote with the rod and socket and we will price the lot.

Questions