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15.40.080 Tables and standards.
This section is included in your selections.

For time limits and technical specifications see Table Nos. 1-A, 1-B, 1-C, and 1-D; Standard Nos. 24-7 and 24-9.

TABLE NO. 1-A

TIME LIMITS FOR PROCEEDINGS FOLLOWING DECEMBER 31, 1998 DEADLINE

Required Action By Owner

Obtain Building Permit Within

Commence Construction Within

Complete Construction Within

Anchorage Installation

1 Year(1)

180 Days(2)

1 Year(2)

Buildings to be Demolished

1 Year(1)

180 Days(2)

1 Year(2)

(1)Measured from the date of the order.

(2)Measured from the date of building permit issuance.

(3)These time limits shall not apply to a change of occupancy involving a Group A Occupancy having an occupant load of 100 or more.

TABLE NO. 1-B

ALLOWABLE VALUES FOR TENSION ANCHORS

Type of Installation

Allowable Values(1)

EXISTING TENSION ANCHORS: Anchors at floor level embedded in brick (to be tested per Section 15.40.050B).

Allowable shall be 40% of the average of the tests for anchors having same wall thickness and joist orientation.

Anchors at floor or roof levels embedded in existing concrete or gunite on the opposite side of the wall.(2)

1800 lb. per anchor.

TENSION BOLTS: Bolts extending entirely through unreinforced masonry walls secured with bearing plates on far side of a 3 wythe minimum wall with a bearing plate having an area of at least 30 square inches.(2)(3)

1800 lbs. per bolt. 900 lbs. for 2 wythe walls.

COMBINATION TENSION AND SHEAR BOLTS: Combination tension and shear bolts are tension bolts centered in a 2½ inch diameter by 8 inch minimum depth hold with dry-pack or nonshrink grout around the circumference of bolt.

Same as for tension bolts.

EMBEDDED BOLTS: Bolts extending to the exterior wall with a 2½ inch round plate under the head and drilled at an angle of 22½ degrees to the horizontal. Bolts shall be centered in 2½ inch diameter holes with dry-pack or non-shrink grout around circumference of bolts. Bolts shall be tested per Section 15.40.050C.

1200 pounds.

(1)A one-third increase in allowable stresses is not allowed for the tabulated values. The allowable capacity shall not be greater than the capacity of the connection to the floor or roof framing.

(2)Bolts to be ½ inch minimum in diameter.

(3)Drilling for bolts and dowels shall be done with an electric rotary drill. Impact tools shall not be used for drilling holes or tightening anchors and shear bolt nuts.

TABLE NO. 1-C

HORIZONTAL FORCE FACTOR “Cp” FOR PARTS OR PORTIONS OF
BUILDINGS OR OTHER STRUCTURES

Part or Portion of Buildings

Direction of Force

Value of Cp

Exterior bearing and nonbearing walls; interior bearing walls and partitions; interior nonbearing walls and partitions over 10 feet in height.

Normal-to-flat surface

0.3

Cantilever parapet and other cantilever walls, except retaining walls.

Normal-to-flat surface

1.00

Exterior and interior ornamentations and appendages.

Any direction

1.00

Prefabricated structural elements, other than walls, with force applied at center of gravity of assembly.

Any horizontal direction

0.30

Connections for exterior panels or elements.

Any direction

2.00

TABLE NO. 1-D

ALLOWABLE VALUE OF HEIGHT-THICKNESS RATIO OF UNREINFORCED
MASONRY WALLS WITH MINIMUM QUALITY MORTAR

Buildings with Crosswalls As Defined by Section 15.40.030

All Other Buildings

Walls of one-story buildings

16

13

First-story walls of two-story buildings

16

15

Walls in top story of multi-story buildings

14

9

All other walls

16

13

(Ord. 3552 § 1, 1993)