The connection of the riser to the molding cavity can be an issue for side risers.

Top risers are advantageous because they take up less space in the flask than a side riser, plus they have a shorter feeding distance.

This is important because the Skyhook RSL is activated by the right hand side riser releasing.

If the riser is located on the casting then it is known as a top riser, but if it is located next to the casting it is known as a side riser.

He winds his way with sly near-inscrutability through the crowds of women as they form and re-form in geometric paths, gallop on the wind like valkyries and lilt together like Greek line dancers, returning to the theater's side risers to sit between dances.