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Unformatted text preview: ndard set forth for reinforced concrete to construction
as specified in this Code, except for the following: lap splicing shall develop the
strength of a full bar. Grout thickness between masonry units and reinforcement
shall not be less than 0.7 centimeters (1/4 inch) or not less than 1/2 bar diameter
or the maximum size of aggregate. (f) Bonding
(1) Stack Bond. Where stack bond is indicated, bond beams or approved horizontal
and vertical joint reinforcement shall be provided adquate to resis lateral forces
due to wind or earthquake. (2) Mechanical Bond.
Mechanical bonding shall be obtained by use of metal ties
laid in the horizontal mortar joints. Such ties shall be required when the grout
pour is excessive in wall construction of layers where the thickness exceeds 5.0 centimeters (2 inches). Metal ties bonding layers together shall be placed
horizontally at 30.5 centimeters (12 inches) maximum on centers.
(1) Moving Units After Placing. Masonry units shall not be moved after they have
been in contact with the mortar. Tapping units downward may be permissible but
not to rock or slide them. (2) Joining Old and New Work.
The intersection of new and old work shall be
adequately bonded and dowelled to provide for continuity of the masonry. (3) Construction Joints.
Where fresh masonry joints what is partially set or totally
set, the exposed surface of the finished masonry shall be cleaned and damped
when necessary to obtain the best possible bond with the new work. All loose
masonry units and mortar shall be removed. Construction joints shall not be
permitted in any beam, only if approved by the Engineer. (h) Corbelling.
The projection for each course in a corbel when used to support structural
members, shall be designed and detailed by the Engineer.
(i) Chases and Recesses. Chases and recesses in masonry walls shall not be constructed as to
reduce the required strength, thickness or fire resistance of the wall. Chases and recesses shall be
designed and constructed as openings. Wood nailers shall not be inserted into masonry walls.
Metal mailing clips may be used. Unless where this is required the design of the wall shall take
the wood into consideration and the pockets shall be provided with proper clearance.
Arches and Lintels.
incombustible materials. Lintels over openings shall be of reinforced masonry or other (k) Adjoining Construction
(1) Joining Conrete and Masonry.
Wherever feasible the concrete shall be poured
against masonry and dowelled adequately. Where masonry be placed against
concrete, extreme care shall be used to insure adequate bonding of the masonry to
the concrete by dowelling, or bolts or other connections. (2) Joining Structural Steel and Masonry.
Where structural steel columns are
adjacent to masonry, there shall be a space of 2.5 centimeters (1 inch) clearance to
be filled solidly with mortar to allow for steel telerances, or with an expansion
joint material where a control joint is designed. The structural steel shal...
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- Fall '12