How to join T-Slot extruded aluminium profiles

How to join T-Slot extruded aluminium profiles aluminum t slot channel T-Slot aluminum extrusion is an ideal material for building modern, strong tank stands and canopies And it isn't as difficult as you might aluminum t slot table Aluminum Extrusion Extruded 8020 Channel Profile T Slot No returns, but backed by eBay Money back guaranteeeBay Money back guarantee 8020 Extrusion This

aluminum t slot table The t-slotted aluminum extrusion is a modular channel, and it's easy to be connected with other aluminum parts without needing to be welded or clamped T

aluminum t slot extrusions channel and tubing? What kind of disadvantages? I do plan to mass Aluminum plate or extrusion for frame?? 626 Ball bearings & 5mm EX-3875 - x Smooth T-Slotted Aluminum Channel SPECIFICATIONS: Weight = lbsft Estimated Area = in2