Steel to Steel Connections: BoxBolt vs Traditional Methods

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The BoxBolt® blind fixing solution is an alternative to traditional steel to steel fixing methods which could help you to make major savings on both cost and design time.

BoxBolt® is fully tested and approved, suitable for use with rectangular, square and even circular hollow sections, and simple to install using our BoxSok® installation tool thanks to the hexagonal head design. BoxBolt® is perfect for when installation time needs to be kept to a minimum.

Not only is BoxBolt® simple to install, it also requires no special knowledge or permits, meaning you can also save money by using it over more common solutions.

As an example, we’ve compared the costs of traditional opposite connection solutions with our BoxBolt® blind fixings, to show just how much you could save.

The opposite connection is a very common connection for steel hollow sections and below are the costings for various solutions including BoxBolt®.

Drilled, tapped and bolted detail (M16 high tensile bolts)

Connection RequirementsRate/hr (£)Time (hrs)Step Cost (£)Details of each step
Engineering460.523Detailing the positions and checking the integrity of the exiting steel after adding holes
Marking of steel260.513The time required to mark the steel on site to ensure alignment with secondary member
Site set up400.2520The time required to access power, get the drilling machine into position
Drilling time on site40140Based on a steel thickness of 12mm and 1/4 hr per hole
Tapping on site400.520Half the time to tap
Tightening of bolts400.28High torques required so allowing for 5 mins per bolt and nut
Drill bits/tapsNANA201 drill bit and 1 tap at £10 each
Material costsNANA10Four bolts, butts and washers at £2.50 each
Totals2.8£154

Welded detail (fully fillet welded connection to red oxide or galvanised steel)

Connection RequirementsRate/hr (£)Time(hrs)Step Cost (£)Details of each step
Engineering450.2511.25Not much design work required apart from highlighting the position of holes
Apply for hot work permit350.5017.50The issue time is set at 30 mins which can be much longer
Marking of steel300.257.50The marking of the steel is at a minimum for a welded connection
Site set up300.5015Time to move equipment, power cords and get machinery ready
Removal of corrosion protection401.040The whole area for the weld needs to be removed by grinding and is time consuming
Performing of weld (inc equipment)701.070Based on a certified welder and equipment to make the connection
Fire watch during and after welding302.060Fire watches can be over longer periods but this is set at 2 hours after welding
Touch up of galv/paint300.3310Replacement of the galv/paint will not be as good as the original finish
Non destructive testing400.3313.2Testing of the weld required to prove load capabilities
Totals6.16£244.45

BoxBolt® connection (four m16 BoxBolts connecting into 12.5mm)

Connection RequirementsRate/hr (£)Time (hrs)Step cost (£)Details of each step
Engineering450.2510Detailing the positions and checking the integrity of the exiting steel after adding holes
Marking of steel260.256.5The time required to mark the steel on site to ensure alignment with secondary member
Site set up400.2510The time required to access power, get the drilling machine into position
Drilling time on site400.2510Based on a flange thickness of 12.5mm and 1/4 hr per hole (see cutting speed rates)
Tightening of bolts400.2010High torques required so allowing for 5 mins per bolt and nut
Material costs (bolts)NANA39.96Four BoxBolts® (BQ1G16) @ £9.99 each
Totals1£86.46

As you can see from the above tables, not only is BoxBolt® the clear favourite in terms of cost savings, but also in time and effort.

BoxBolt® provides the same secure connection as traditional solutions with greater benefits for architects and installers.

For more information, click here, or to talk to us about a quote call 020 8874 6566 or use our online contact form.

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Tue, 08/28/2018 – 11:27

The BoxBolt® blind fixing solution is an alternative to traditional steel to steel fixing methods which could help you to make major savings on both cost and design time.

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