Or. Admin. R. 411-087-0470
(2) Unheated Areas. Sprinkler systems located in unheated areas or above the insulated ceiling system shall be of a dry type, have automatic heaters that maintain a minimum temperature of 40 degrees Fahrenheit, or have an antifreeze system.
[Publications: Publications referenced are available from the agency.]
ORS 410.070 & 441.055
ORS 441.055 & 441.615
SSD 22-1991, f. 12-31-91, cert. ef. 1-1-92