Feature Contents Code Notes Secondhand Units..............................................................................................122 Terra Cotta..........................................................................................................139 Combined Units..................................................................................................154 Hollow Glass Units.............................................................................................169 Rubble Stone Wall Thickness.............................................................................180 Installation of Manufactured Stone ....................................................................183 Mortar and Glass Masonry.................................................................................190 Type O Mortar. ....................................................................................................192 Type K Mortar.....................................................................................................193 Grout. ..................................................................................................................194 Cold and Hot Weather Masonry.........................................................................195 Wall Tie Installation. ............................................................................................204 Horizontal Continuous Joint Reinforcement. .......................................................208 Tooling Mortar Joints..........................................................................................237 Weep Holes........................................................................................................244 Minimal Nominal Wall Thickness........................................................................248 Corbel Projection................................................................................................250 Pier Cap. .............................................................................................................251 Cavity Walls........................................................................................................260 Grouting Requirements. ......................................................................................263 Stone and Masonry Veneer................................................................................293 Foundation Extending above Finished Grade. ....................................................313 Dampproofing of Concrete and Masonry Foundations.......................................318 Isolated Masonry Piers.......................................................................................319 Wall Ties.............................................................................................................335 Grouting. .............................................................................................................338 Chases...............................................................................................................348 Lintels.................................................................................................................349 Corbel Projection Limitations..............................................................................360 Firebox Dimensions............................................................................................371 Dampers.............................................................................................................372 Hearth Thickness. ...............................................................................................373 Footings and Foundations for Fireplaces and Chimneys. ...................................373 Chimneys. ...........................................................................................................374 Air Entrainment. ..................................................................................................385 ICF Construction. ................................................................................................419 Concrete Flatwork Thickness.............................................................................427 Green Notes Environmental Impact of Brick Manufacture.......................................................115 Fly Ash. ...............................................................................................................153 xvi