Measured on the side away from the pool. Panels are cut so the finished height clears it once the spigot and the deck are accounted for.
Openings cannot allow a four inch sphere through. That governs the gap between panels and, just as importantly, the gap under them.
It has to swing away from the pool and latch on its own every time. The release sits high enough to be out of a small child's reach.
Furniture, planters and equipment cannot give a climbing route over the barrier. This is what people fail at inspection, not the height.
A hydraulic hinge brings it back from any position, with no help and no push.
The latch has to catch on its own. A gate that needs a nudge does not pass.
It swings outward, so a child leaning on it pushes it shut rather than open.
The release is mounted high on the glass, on the pool side of the gate.
What it is made of and how thick it is. A paver deck and a poured slab anchor differently.
Whether we can core drill or have to surface mount.
Decks slope for drainage. Glass does not follow a slope, so the step gets designed in.
Where it should sit for how you actually use the yard.