San Mateo Municipal Code Ch. 23.54 Building Security Code

The purpose and intent of the Standards contained herein are as follows:

(a) To safeguard property and to promote public welfare and safety by providing security standards to be used in the design, construction, and maintenance of buildings and vehicles and the quality of materials used therein.

(b) To apply Crime Prevention Through Environmental Design and Defensible Space Techniques.

(c) To provide a safe secure environment for all development in the City, and to provide properties that tend to police themselves, requiring fewer police calls for service, or the need for other city services or problem resolution assistance.

(d) To provide a safe, secure environment for all users of the property, while reducing potential negative impacts on the community, and to reduce their litigation potential for premises liability issues.

For the purpose of this chapter, the following terms, words, phrases, and their derivations shall have the meaning given in this section:

(a) "Approved" means certified as meeting the requirements of this chapter by the enforcing authority or its authorized agents, or by other officials designated by law to give approval on a particular matter dealt with by the provisions of this chapter with regard to a given material, mode of construction, piece of equipment or device.

(b) "Auxiliary locking device" means a secondary locking system added to the primary locking system to provide additional security.

(c) "Bolt projection" or "bolt throw" means the distance from the edge of the door, at the bolt centerline, to the farthest point on the bolt in the projected position.

(d) "Burglary-resistant glazing" means 5/16" security laminate, 1/4" polycarbonate, or some other security film treatment applied to existing glazing approved by the Police Department.

(e) "City" means the City of San Mateo.

(f) "Class C" or "Class TL-15 safe" means burglary classification TL-15, signifying a combination-locked steel chest or money safe designed to offer a limited degree of protection against expert burglary by common hand tools.

(1) Safes shall weigh at least seven hundred fifty pounds, or shall be equipped with suitable anchors and instructions for anchoring in larger safes, in concrete blocks or to the premises in which located.

(2) All safes of this class shall be equipped with a relocking device. They shall be constructed of open hearth steel, either cast or welded plate, combined with special materials to resist carbide drills.

(g) "Commercial building" means a building, or portion thereof, used for a purpose other than a dwelling.

(h) "Component" as distinguished for a part, means a subassembly which combines with other components to make up a total door or window assembly. For example, the primary components of a door assembly include: door, lock, hinges, jamb/wall, jamb/strike and wall.

(i) "Cylinder Guard" is a hardened ring surrounding the exposed portion of a lock cylinder which is so fashioned as to protect the lock cylinder from wrenching, prying, cutting or pulling by mechanical devices.

(j) "Deadbolt" means a lock bolt which does not have a spring action as opposed to a latch bolt which does. The bolt must be actuated by a key or a key and a knob or thumbturn and when projected becomes locked against return by end pressure.

(k) "Deadlatch" or "deadlocking latch bolt" means a spring actuated latch bolt having a beveled end and incorporating a plunger which, when depressed, automatically locks the projected latch bolt against return by end pressure.

(l) "Double cylinder deadbolt" means a deadbolt lock which can be activated only by a key on both the interior and exterior.

(m) "Dwelling" means a building or portion thereof designed exclusively for residential occupancy, including single family and multiple family dwellings.

(n) "Enforcing authority" means the building official of the City with the assistance of the authorized representative of the Chief of Police.

(o) "Insert" is a hardened steel roller inside unhardened lock bolts to prevent cutting or sawing of the locked bolt.

(p) "Person" means any person, firm partnership, association, corporation, company or organization of any kind.

(q) The word "shall" is mandatory, and the word "may" is permissive and the word "should" is suggestive.

(r) "Single cylinder deadbolt" means a deadbolt lock which is activated from the outside by a key and from the inside by a knob, thumb-turn, lever, or similar mechanism, or has no turnpiece on the inside.

(s) "Single-family dwelling" means a building designed exclusively for residential occupancy by one family.

(a) The requirements imposed by this chapter shall apply to all new construction, and shall apply to existing construction as provided in this section. For the purposes of this section, "existing" shall include (1) buildings and grounds lawfully in existence at the time an ordinance imposing a new requirement becomes effective, and (2) construction and site development for which a building permit has been issued and is still valid whether or not construction has begun.

(b) No alterations, additions, or repairs to existing single family dwelling units shall trigger the need for compliance with the provisions of chapter.

(c) Existing multi-family and commercial buildings and the grounds serving those buildings shall be required to comply with the provisions of this chapter, as follows:

(1) All portions of an existing building that is altered, added, or repaired shall comply with the requirements imposed by this chapter; and

(2) the requirements of 23.54.060 concerning exterior lighting shall apply if based upon documented crime statistics and/or calls for police service to the building there is a demonstrated need for improved crime prevention measures, unless the cost of complying with those requirements exceed 10% of the cost of the proposed building alteration, addition, or repair. If the cost of complying with the exterior lighting requirements exceeds 10% of the cost of the proposed building alteration, addition, or repair, the applicant shall spend at least 10% of that cost exterior lighting requirements imposed by Section 23.54.060.

All new buildings five or more stories in height shall provide a location on the building for installation of City radio communications equipment, including antennas and their supporting equipment. An electrical supply source shall be provided by the permittee at the antenna/equipment location, and reasonable access shall be provided by the permittee and/or building owner to City staff and/or City contractors for installation of necessary telephone lines and for purposes of installation, maintenance, adjustment and repair of the antenna/equipment. This access and location agreement shall be recorded in terms that convey the intent and meaning of this condition in the form approved by the City Attorney.

Parking garages serving residential uses shall be provided with electrically operated closures to allow passage of motor vehicles, except that required visitor parking shall have unrestricted access. The closures, whether overhead, sliding or swinging shall be provided with reopening devices which will function to stop and reopen the closure in case the closure is obstructed when closing. Openings into the garage which are not for vehicular or human passage shall be provided with security grilles or screens. Digital keypads shall be provided to allow for entry by services and emergency services vehicles. Exterior doors or gates providing access to the secure areas of the parking garage shall remain locked at all times, and shall only be accessible through the use of keys furnished to the building residents.

Notwithstanding the provisions of section 23.54.015 and whether or not the building housing a business is existing, those businesses subject to a high risk of robbery shall limit the available cash on hand through use of a time-delay drop type money safe. For the purposes of this section a business shall be deemed to be subject to high risk of robbery if either the business has been robbed on two occasions within a 12-month period, or the business has been robbed on three occasions while under the same ownership. Safes installed shall be rated "Class C" or Class TL-15 minimum.

(a) The provisions of this section shall apply to banks, savings and loans, and other institutions providing banking services.

(b) Security cameras shall be provided and shall be placed so as to provide full coverage of any lobby area.

(c) Exit doors accessible to the public shall be provided with clearly marked height markers on the door frames. The markers shall, at a minimum, be placed at five (5) and six (6) feet above the floor.

(d) Counter tops at all teller stations shall be constructed of a smooth, non-porous material.

(e) Exterior automatic teller machines shall be positioned so as to be clearly visible from the adjacent street, shall be illuminated during hours of darkness, and shall be equipped with security cameras.

(f) Notwithstanding the provisions of subsection (a), any location at which an automatic teller machine is operated shall comply with the following requirements:

(1) Exterior automatic teller machines shall be located so as to be clearly visible from the adjacent street, shall be illuminated during the hours of darkness, and shall be equipped with security cameras.

(2) Interior automatic teller machines shall be equipped with security cameras.

(a) Parking lots, driveways, circulation areas, aisles, passageways, recesses, and grounds contiguous to all commercial and multifamily residential buildings shall be provided with lighting sufficient to provide adequate illumination to make clearly visible the presence of any person on or about the premises during the hours of darkness and provide a safe, secure environment for all persons, property, and vehicles on site. Such lighting shall be equipped with vandal-resistant covers.

(1) All exterior doors shall be provided with their own light source and shall be adequately illuminated at all hours to make clearly visible the presence of any person on or about the premises and provide adequate illumination for persons exiting the building.

(2) Business premises, while closed after dark, must be sufficiently lighted by use of interior night lights equipped with motion detectors to make clearly visible the presence of any person within the premises.

(3) Exterior door, perimeter, parking area and canopy lights shall be controlled by photocell or timer and shall be left on during hours of darkness or diminished lighting.

(b) The lighting required in subsection (a) of this section shall be installed according to project specific illumination levels prescribed and a lighting plan reviewed and approved by the Police Department and the Building Official. Review and approval shall be based upon criteria including but not limited to:

(1) The nature and use of the area within the development;

(2) The type of area in which the development is located;

(3) The hours of use of the area to be lighted;

(4) The frequency of use of the area to be lighted;

(5) Existing lighting in the area;

(6) Past Criminal or crime related incidents in the area;

(7) Physical characteristics of the structure and/or development under proposed construction.

(c) Lighting levels shall comply with current Energy Code requirements.

(d) The lighting system shall be so designed as to limit light spill beyond property lines and to shield the light source from view from off site.

(a) Exterior doors shall comply with the following:

(1) Exterior doors (excluding individual unit-entry doors) and doors leading from garage areas into multiple dwelling buildings, and doors leading into stairwells below the sixth floor level, shall have self-locking (deadlatch) devices, allowing egress from the building or into the garage area, or stairwell, but requiring a key to be used to gain access to the interior of the building from the outside or garage area or into the hallways from the stairwell.

(2) Exterior doors (excluding individual unit-entry doors) and doors leading from the garage areas into multiple dwelling buildings, and doors leading into stairwells, shall be equipped with self-closing devices, if not already required by other regulations, ordinances, or codes.

(b) Hinged entrance doors to individual motel, hotel, and multiple-family dwelling units shall comply with the following:

(1) All doors shall be of solid core with a minimum thickness of one and three-eights (1-3/8) inches.

(2) Hinged entrance doors to individual units shall have deadbolts with one-inch minimum throw and hardened steel inserts in addition to door deadlatches with one-half inch minimum throw. The locks shall be so constructed that both deadbolt and deadlatch can be retracted by a single action of the inside doorknob. Alternate devices to equally resist illegal entry may be substituted subject to prior approval of the Building Official. Strike plates shall be secured to jambs with at least two and one-half (2-1/2) inch screws.

(3) An interviewer or peephole shall be provided in each individual unit entrance door and shall allow for 180 degree vision. Vision panels may be provided; however, vision panels located within reach of the inside activating device must be of burglary resistant glazing or equivalent protection as approved by the Police Department.

(4) Doors swinging out shall have non-removable hinge pins or hinge studs to prevent removal of the door.

(5) Door closers may be provided on each individual unit entrance door, and are encouraged in hotel and motel projects.

(6) In-swinging exterior doors shall have rabbited jambs.

(7) Jambs for all entry doors shall be constructed or protected to prevent violation of the function of the strike and shall meet the framing requirements of Section 23.54.080 (a)(1)

(c) Sliding patio-type doors opening onto patios or balconies which are accessible from the outside shall comply with the following (this includes accessibility from adjacent balconies):

(1) The movable section of a single sliding patio door(s) shall be adjusted in such a manner that the vertical play is taken up to prevent lifting with a pry tool to defeat the locking mechanism.

(2) Deadlocks shall be provided on all sliding patio doors. Mounting screws for lock case shall be inaccessible from the outside. Lock or hook bolts shall be of hardened material or have hardened steel inserts. The lock or hook bolts shall engage the strike sufficiently to prevent its being disengaged by any movement of the door within the space or clearances provided for installation and operation. The strike area shall be reinforced to maintain effectiveness of bolt strength.

(3) In addition to the primary locking device, auxiliary or secondary locking devices shall be provided on all accessible sliding glass doors.

(4) Double sliding patio doors shall be locked at the meeting rail and meet the locking requirements of subdivision (c)(2) of this section.

(d) Windows.

(1) A window, skylight, or other natural light source forming a part of the enclosure of a dwelling unit shall be constructed, installed, and secured as set forth in subsection (d)(2) of this section, when such window, skylight or light source is not more than twelve feet above the ground of a street, roadway, yard, court, passageway, corridor, balcony, patio, breezeway, portion of the building which is available for use by the public or other tenants, or similar area. A window enclosing a private garage with an interior opening leading directly to a dwelling unit shall also comply with subsection (d)(2) of this section.

(2) Window Protection.

(A) Windows shall be so constructed that when a window is locked it cannot be lifted from the frame and the sliding portion of a window shall be on the inside track. The vertical play shall be taken up to prevent lifting of the movable section to defeat the locking mechanism.

(B) Window locking devices shall be capable of withstanding a force of two-hundred pounds applied in any direction.

(C) Louvered windows shall not be used.

(D) Accessible windows that open shall be equipped with secondary locking devices.

(e) Garages. Those multiple-family dwelling complexes providing individual enclosed garage spaces shall meet the same requirements for garages as single-family dwellings as required by section 23.54.080 (b) Floor to ceiling demising walls shall separate individual garage areas having their own entrance.

(f) If community laundry rooms are provided, laundry room doors shall be equipped with a window to allow visibility into the interior to the room. The laundry room shall be kept locked and the lock shall be keyed so that unit keys can open the lock.

(g) Keying Requirements. Upon occupancy by the owner or proprietor, each single unit in a tract or commercial development, constructed under the same land use approval plan, shall have locks using combinations which are interchange free from locks used in all other separate dwellings, proprietorships or similar distinct occupancies.

(h) Numbering of Buildings and Units. There shall be positioned at each entrance of a multiple family dwelling complex an illuminated diagrammatic representation of the complex which shows the location of the viewer and the unit designations within the complex. The illuminated diagrammatic representation shall be protected by the use of vandal-resistant covers.

(a) Doors.

(1) Exterior doors.

(A) Exterior doors and doors leading from garage areas into single family dwellings shall be of solid core with a minimum thickness of one and three-eighths (1-3/8) inches.

(B) Exterior doors for single family dwellings and garages shall have deadbolt locks with a one (1) inch minimum throw in addition to deadlatches. The locks shall be so constructed that both deadbolt and deadlatch can be retracted by a single action of the inside doorknob. Alternate devices equally resistant to illegal entry may be substituted subject to prior approval of the Building Official. Strike plates shall be secured to wooden jambs with at least two and one-half (2-1/2) inch wood screws.

(C) Doors leading from enclosed garage areas into single-family dwellings shall have deadbolts in addition to deadlatches.

(D) Vision panels in exterior doors or within reach of the inside activating device must be of burglary resistant glazing or equivalent as approved by the Police Department.

(E) Openings for delivery of mail shall be no larger than twenty-four (24) square inches. Openings located within three (3) feet of any locking device shall be constructed to prohibit access to the interior doorknob.

(F) Exterior doors swinging out shall have non-removable hinge pins or hinges with studs.

(G) Exterior doors swinging in shall have rabbited jambs.

(H) Door frames shall be installed or protected to prevent violation of the function of the strike.

(I) Door jambs shall be installed with solid backing in such a manner that no voids exist between the strike side of the jamb and the frame opening for a vertical distance of six (6) inches each side of the strike. In wood framing, horizontal blocking shall be placed between studs at door lock height for three stud spaces each side of the door openings. Trimmers shall be full length from the header to the floor with solid backing against sole plates. The strike plate for deadbolts on all wood-framed doors shall be constructed of minimum sixteen U.S. gauge steel, bronze, or brass and secured to the jamb by a minimum of two screws, which must penetrate at least two and one-half (2-1/2) inches into solid backing beyond the surface to which the strike is attached.

(J) On pairs of doors, the active leaf shall be secured with the type of lock required for single doors in subsection (a)(1)(B) of this section. The inactive leaf shall be equipped with lever flush extension bolts or equivalent, protected by hardened material with a throw of three-fourths (3/4) inch at head and foot. Multiple point locks, cylinder-activated from the active leaf and satisfying the requirements above may be used in lieu of flushbolts. An interviewer or peephole shall be provided in each main entry door and shall allow for 180 degree vision or more.

(2) Sliding patio type doors opening onto patios or balconies which are otherwise accessible from the outside (this includes accessibility from adjacent balconies) shall comply with the following:

(A) Single sliding patio doors shall be adjusted in such a manner that the vertical play is taken up to prevent lifting with a pry tool to defeat the locking mechanism.

(B) Deadlocks shall be provided on all single sliding patio doors. Mounting screws for the lock cases shall be inaccessible from the outside. Lock or hook bolts shall be hardened steel or have hardened steel inserts. The lock or hook bolt shall engage the strike sufficiently to prevent its being disengaged by any possible movement of the door within the space or clearances necessary for installation and operation. The strike area shall be reinforced to maintain effectiveness of bolt strength.

(C) In addition to the primary locking device, auxiliary or secondary locking devices shall be provided on all accessible sliding-glass doors.

(D) Double sliding patio doors shall be locked at the meeting rail and meet the locking requirements of subdivision (a)(2)(B) of this section.

(b) Windows.

(1) A window, skylight, or other natural light source forming a part of the enclosure of a dwelling unit shall be constructed, installed, and secured as set forth in subdivision (b)(2) of this section when such window, skylight, or light source is not more than twelve feet above the ground of a street, roadway, yard, court, passageway, corridor, balcony, patio, breezeway or any portion of the building which is available for use by the public or otherwise tenants, or similar area. A window enclosing a private garage, with an interior opening leading directly to a dwelling unit, shall also comply with subdivision (b)(2) of this section.

(2) Window Protection.

(A) Windows shall be constructed so that when the window is locked it cannot be lifted from the frame, and the sliding portion of a window shall be on the inside track. The vertical play shall be taken up to prevent lifting of the movable section to defeat the locking mechanism.

(B) Louvered glass windows shall not be used.

(C) Accessible windows that open should be equipped with secondary locking devices.

(c) Garages. Overhead garage doors shall be provided with a locking device or automatic door opener and shall not have bottom vents except those doors having double louvered or shielded vents or approved alternate devices to protect the locking mechanism.

(d) Keying Requirements. Upon occupancy by the owner each single unit in a tract constructed under the same land use approval plan shall have locks using combinations which are interchange free from locks used in all other separate dwellings.

(a) Doors. All exterior doors shall be secured as follows:

(1) A single metal-frame door shall be secured with either a double-cylinder deadbolt or a single-cylinder deadbolt without a turnpiece. A lock, hook, bar, or expanding bolt shall have a throw of three-fourths (3/4) inch to one (1) inch minimum.

(2) Single solid-core doors or hollow sheet-metal doors shall be a minimum of one and three-eights (1-3/8) inches thick and shall be secured with a deadbolt lock with a minimum throw of one inch, locking hardware shall be installed so that both deadbolt and deadlocking latch can be retracted by single action of the inside knob, lever, or thumbturn. When wooden jambs are used, strike plates shall be secured to wooden jambs with at lease two and one- half (2-1/2) inch wood screws. On pairs of doors, the active leaf shall be secured with the type of lock required for single doors in subsection (a)(1) of this section. The inactive leaf shall be equipped with automatic flush extension bolts protected by hardened material with a minimum throw of three-fourths (3/4) inch at head and foot and shall have no door knob or surface mounted hardware. Multiple point locks, cylinder activated from the active leaf and satisfying the requirements, may be used in lieu of flushbolts.

(3) Any single or pair of doors requiring locking at the bottom or top rail shall have locks with a minimum of one throw bolt at both the top and bottom rails.

(4) Panic hardware, whenever required by the Building Code shall be installed in accordance with the manufacturer's recommendations and shall comply with the following:

(A) Doors shall have an astragal constructed of steel 0.125 inches thick which shall be attached with non-removable bolts to the outside of the door if the inside activating member is the type that can be tripped by a fish wire or similar device. The astragal shall extend a minimum of six inches vertically above and below the latch of the panic hardware. The astragal shall be a minimum of two (2) inches wide and extend a minimum of one (1) inch beyond the edge of the door to which it is attached. No surface-mounted exterior hardware need be used.

(B) Double doors containing panic hardware shall have an astragal attached to the doors at their meeting point which will close the opening between them, but not interfere with the operation of either door.

(5) Exterior sliding commercial entrances shall be secured as in section 2.54.080(a)(2) and shall comply with fire and safety regulations.

(6) Exterior roll-up overhead doors, solid overhead swinging, sliding or accordion doors shall be secured with a cylinder lock and/or padlock on the inside, when not otherwise controlled or locked by electric power operation. Masonite panels in such doors shall not exceed eight (8) inches by twelve (12) inches and shall be located so that they are no closer than three (3) feet to any locking device.

(7) Metal accordion grate or grill-type doors shall be equipped with metal guide tracks at top and bottom, and a cylinder lock and/or padlock. The bottom track shall be so designed that the door cannot be lifted from the track when the door is in a locked position.

(8) Outside hinges on all exterior doors shall be provided with non-removable pins when using pin-type hinges or shall be provided with hinge studs.

(9) Doors with glass panels and doors that have glass panels adjacent to the door frame shall be secured as follows:

(A) Rated burglary-resistant glass or glass-like material; or

(B) the glass shall be covered with iron bars of at least one-half (1/2) inch round or on by one-fourth (1/4) inch flat steel material, spaced not more than five inches apart, secured on the inside of the glazing; or

(C) Iron or steel grills of at least one-eighth (1/8) inch material of two (2) inch mesh secured on the inside of the glazing.

(10) Wood doors swinging in shall have rabbited jambs.

(11) Jambs for all doors shall be constructed or protected to prevent violation of the function of the strike.

(12) A double cylinder deadbolt lock or a single cylinder deadbolt lock without a turnpiece may be used in "Group B" occupancies as defined by the California Building Code. When used, there must be a readily visible durable sign on or adjacent to the door stating "This door to remain unlocked during business hours", employing letters not less than one (1) inch high on a contrasting background. The locking device must be of type that will be readily distinguishable as locked, and its used may be revoked by the Building Official for due cause.

(b) Windows.

(1) Accessible rear and side windows not viewable from the street shall consist of rated burglary-resistant glazing or its equivalent.

(2) All accessible windows, capable of being opened, shall be secured on the inside with a locking device.

(3) Louvered windows shall not be used.

(4) Outside hinges on all accessible side and rear glass windows shall be provided with non-removable pins. If the hinge screws are accessible, the screws shall be of the non-removable type.

(5) Accessible windows that open should be equipped with secondary locking devices.

(c) Transoms and Awning Windows. All exterior transoms and awning windows exceeding sixty (60) square inches on the front, side or rear of any building shall be protected by fully tempered glass or rated burglary-resistant glass or glass-like material.

(d) Roof Openings.

(1) All glass or glass-like skylights on the roof of any building shall be provided with:

(A) Rated burglary-resistant glass or glass-like acrylic material; or

(B) Iron bars of at least one-half (1-1/2) inch round or one (1) by one-fourth (1/4) inch flat steel material spaced no more than five (5) inches apart under the skylight and securely fastened; or

(C) A steel grill of at least one-eighth (1/8) inch thick material of two (2) inch mesh under the skylight and securely fastened.

(2) All hatchway openings on the roof of any building shall be secured as follows:

(A) If the hatchway is of wooden material, it shall be covered on the outside with at least sixteen (16) gauge sheet steel or its equivalent attached with screws.

(B) The hatchway shall be secured from the inside with a slide bar or slide bolts. The use of a crossbar or padlock must be approved by the fire marshal.

(C) Outside hinges on all hatchway openings shall be provided with non-removable pins when using pin-type hinges.

(3) All air duct or air vent openings exceeding eight (8) inches by twelve (12) inches on the roof or exterior walls of any building shall be secured by covering the same with either of the following:

(A) Iron bars of at least one-half (1/2) inch round or one by one-fourth (1/4) inch thick flat steel material, spaced no more than five (5) inches apart and securely fastened; or

(B) A steel grill of at least one-eighth inch thick material of two (2) inch mesh and securely fastened; and

(C) If the barrier is on the outside, it shall be secured with galvanized rounded head flushbolts of at least three-eighths (3/8) inch diameter on the outside.

(e) Ladders.

(1) Any ladder, excluding fire escapes, located on the exterior of any building which could provide access to the roof shall be not less than ten (10) feet from any accessible ground area.

(2) Ladders accessible from ground level shall be fully enclosed with sheet metal in an approved manner to a height of ten (10) feet. This covering shall be locked against the ladder with a case hardened hasp, secured with non-removable screws or bolts. Hinges on the cover will be provided with non-removable pins when using pin-type hinges. If a padlock is used, it shall have a hardened shrouded steel shackle, locking at both heel and toe, and a minimum five (5) pin tumbler operation with non-removable key when in an unlocked positions.

(f) Special Security Measures. All entrance doors to individual office suites, in multiple occupancy office building, shall have a deadbolt lock.

(g) Keying Requirements. Upon occupancy by the owner or proprietor, each single unit in a commercial development constructed under the same plan, shall have locks using combinations which are interchange free from locks used in all other separate proprietorships or similar distinct occupancies. Tenants shall have direct access to any room or enclosure which is used to contain metering and/or switching devices for the respective tenant.

(h) Numbering of Buildings. Each different unit within a multiple-tenant building shall have its address prominently displayed on or adjacent to its front and rear doors.

(i) All entrance doors to individual office suites, in multiple occupancy office buildings, shall have a deadbolt lock.

Additional security measures may be required by other more project specific codes or by the Zoning Administrator, Planning Commission, or City Council as conditions of approval of a land use permit, or specific plan, when, due to the particular circumstances presented by the proposed project and the circumstances under which the project shall be constructed and operated, the imposition of additional measures is necessary to support the finding that the project is consistent with the community's health, safety, and general welfare.

The decision maker approving a planning application may condition the approval to require the applicant to install and maintain construction site fencing and/or the use of security lighting and patrols when a recommendation for such a condition is made by the San Mateo Police Department.

The provisions of this chapter are not intended to prevent the use of any material or method of construction not specifically prescribed by this chapter, provided any such alternate has been approved by the enforcing authority as affording the same measure of protection as those prescribed by this chapter. Nor is it the intention of this chapter to exclude any such method of structural design or analysis not specifically provided for in this chapter.

In the event any section, clause or provision of this chapter shall be determined invalid or unconstitutional, such section, clause or provision shall be deemed severable and all other sections or portions hereof shall remain in full force and effect.