System: top-rail, channel, point-fixed
Top-rail system: glass panels mount in vertical posts with a horizontal top rail tying them together. Most common residential deck and balcony system. Channel system: continuous aluminum or stainless channel along the floor, no posts, frameless contemporary look, most code-stringent. Point-fixed: glass mounted to stainless standoffs, no channel, the cleanest look, most expensive.
Glass spec, code compliance, install
Glass: tempered laminated (two tempered panes bonded with PVB interlayer) is the code-required spec for railings. If the glass breaks, the laminate holds the broken pieces in place. Thickness 1/2" to 3/4" depending on system and panel height.
Code: IRC for residential, IBC for commercial. Top-rail requirement at 42" off finished surface for any drop of 30"+. Glass-only frameless systems require structural engineering per AHJ; documentation supplied per project.
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