Weapons prohibited in certain places—Local laws and ordinances—Exceptions—Penalty.
(1) It is unlawful for any person to enter the following places when he or she knowingly possesses or knowingly has under his or her control a weapon:
(a) The restricted access areas of a jail, or of a law enforcement facility, or any place used for the confinement of a person (i) arrested for, charged with, or convicted of an offense, (ii) held for extradition or as a material witness, or (iii) otherwise confined pursuant to an order of a court, except an order under chapter 13.32A or 13.34 RCW. Restricted access areas do not include common areas of egress or ingress open to the general public;
(b) Those areas in any building which are used in connection with court proceedings, including courtrooms, jury rooms, judge's chambers, offices and areas used to conduct court business, waiting areas, and corridors adjacent to areas used in connection with court proceedings.

There is a misunderstanding going on. You can carry into the court HOUSE not the court ROOM. When I renew my cpl I carry but BEFORE I go through the metal detector I let the officer know. They then lock it up and it is returned when I leave