(A) General. In addition to the seismic analysis required elsewhere in this subchapter, the licensed engineer or architect responsible for the seismic analysis of the building shall determine and record the information required by this section on the approved plans.
(B) Construction details. The following requirements with appropriate construction details shall be made part of the approved plans:
(1) (a) All unreinforced masonry walls shall be anchored at the roof level by tension bolts through the wall as specified in § 9 of the appendix following this chapter or by approved equivalent at a maximum anchor spacing of six feet.
(b) All unreinforced masonry walls shall be anchored at all floors with tension bolts through the wall or by existing rod anchors at a maximum anchor spacing of six feet. All existing rod anchors shall be secured to the joists to develop the required forces. The Department may require testing to verify the adequacy of the embedded ends of existing rod anchors. Tests when required shall conform to § 150.088(H) of this subchapter.
(c) When access to the exterior face of the masonry wall is prevented by proximity of an existing building, wall anchors conforming to Item 5 in § 9 of the appendix following this chapter may be used. Alternative devices to be used in lieu of tension bolts for masonry wall anchorage shall be tested as specified in § 150.088(I) of this subchapter.
(2) Diaphragm chord stresses of horizontal diaphragms shall be developed in existing materials or by addition of new materials.
(3) Where trusses and beams other than rafters or joists are supported on masonry, ledges or columns shall be installed to support vertical loads of the roof or floor members.
(4) (a) Parapets and exterior wall appendages not capable of resisting the forces specified in this subchapter shall be removed, stabilized or braced to ensure that the parapets and appendages remain in their original position.
(b) The maximum height of an unbraced, unreinforced masonry parapet above the lower of either the level of tension anchors or roof sheathing, shall not exceed one and one-half times the thickness of the parapet wall. If the required parapet height exceeds this maximum height, a bracing system designed for the force factors specified in § 5 of the appendix following this chapter and Table No. 23-P of the Uniform Building Code for walls shall support the top of the parapet. Parapet corrective work must be performed in conjunction with the installation of tension roof anchors.
(c) 1. The minimum height of a parapet above the wall anchor shall be 12 inches.
2. Exception. If a reinforced concrete beam is provided at the top of the wall, the minimum height above the wall-anchor may be six inches.
(5) All deteriorated mortar joints in unreinforced masonry walls shall be pointed with Type S or N mortar. Prior to any pointing, the wall surface must be raked and cleaned to remove loose and deteriorated mortar. All preparation and pointing shall be done under the continuous inspection of a registered deputy building inspector certified to inspect masonry or concrete. At the conclusion of the project, the inspector shall submit a written report to the Department setting forth the portion of work inspected.
(6) Repair details of any cracked or damaged unreinforced masonry wall required to resist forces specified in this subchapter.
(C) Existing construction. The following existing construction information shall be made part of the approved plans:
(1) The type and dimensions of existing walls and the size and spacing of floor and roof members;
(2) The extent and type of existing wall anchorage to floors and roof;
(3) The extent and type of parapet corrections which were performed;
(4) Accurately dimensioned floor plans and masonry wall elevations showing dimensioned openings, piers, wall thickness and heights;
(5) The location of cracks or damaged portions of unreinforced masonry walls requiring repairs;
(6) The type of interior wall surfaces and if reinstalling or anchoring of ceiling plaster is necessary;
(7) The general condition of the mortar joints and if the joints need pointing.
('65 Code, § 8-15.10) (Ord. 321-C.S., passed - - ) Penalty, see § 10.99