Webs (2003)

Richard Greico leads a team of electrical workers who stumble across a terrifying parallel universe While investigating a strange power source in an abandoned building the workers find themselves sucked into an underworld teeming with massive maneating spiderlike monsters The bloodthirsty arachnidhuman hybrids stalk and kill their victims one by one leaving the dwindling group of survivors to fight back with just their wits and a handful of primitive weapons