Are twin slot brackets strong enough to support a shelf layout?

twin slot rail   Dan twin slot uprights

See options Emuca - Twin slot wall rail for shelf brackets, Pinch to zoom in further SEE MORE DETAILS Emuca

I'm thinking of using twin slot shelving but I was wondering using Pine timber shelving brackets as an alternative, with foam insulation Heavy duty twin slot shelving from Wall mounted modular shelving that's easy to install & customise Next day delivery, free delivery over £30

slot of fun This Twin Slot 'D' rail is 500mm wide and is designed to be used with the accessory bar Perfect for hanging your clothing items It comes in Chrome 2 x Replacement End Caps for Twin Slot Rails Need a replacement End Cap for your Twin slot rail then just add a pair of these to your basket End caps only