How to mount a large TV onto plasterboard/drywall studwork, using a full motion cantilever TV wall bracket
It is very important to use a bracket with a large rectangular base plate. The dimensions of the baseplate are usually 480mm length 240mm width or thereabouts.
Do not use the type of bracket with a narrow vertical type of base plate:
Plasterboard/drywall is installed onto a wooden/metal framework. The vertical studwork is usually centred at 400mm 450mm 500mm or 600mm, most commonly 500mm centres. Use a stud finder device to find the centres.
When using a 480mm x 200mm baseplate the chances are that you will be able to get a fix into one of the vertical studs. You can adapt the baseplate if required. If there isn’t a fixing hole in the baseplate which falls in line with the vertical stud, simply drill a hole in the baseplate to match.
For the other fixing points use GeeFix cavity wall fixings. Position the backplate/anchor in the cavity either vertically or at a 45degree angle or thereabouts. The screws provided in the pack will be strong enough for your installation, just use metal washers on the screws to suit your bracket fixing points