Restricted Area (Stop) No Trespassing - Construction Work in Progress Contractor Preferred Max Sign warns readers that the following area is a restricted, no trespassing zone--any violators will be prosecuted. Contractor Preferred Max Signs have large dimensions 48"H x 96"W x 3/8"D constructed from corrugated plastic. These large signs are optimized for distant visibility to ensure people's safety. Mouting options include a wall mount, fence mount, or mounted on plywood. For shipping conveniences, signs are tri-folded and scored.