Call me at (213) 804-7437 – Fastest Delivery – Same Day Service. We will even install the No Trespassing Sign. Signage shall be posted as follows: 12X24 minimum incombustible material minimum of 4 holes, the maximum dimension of 1/4 punch or drilled no closer than 3/8 from the edge/corner of the sign. Attachment: Securely fasten … Continue reading los angeles no trespassing sign requirements