Masonry walls shall be laterally supported in either the horizontal or the vertical direction. The maximum spacing between lateral supports shall not exceed the distances in Table R606.6.4. Lateral support shall be provided by cross walls, pilasters, buttresses or structural frame members where the limiting distance is taken horizontally, or by floors or roofs where the limiting distance is taken vertically.
SPACING OF LATERAL SUPPORT FOR MASONRY WALLS
|CONSTRUCTION||MAXIMUM WALL LENGTH TO THICKNESS OR WALL HEIGHT TO THICKNESSa, b|
|Solid or solid grouted||20|
For SI: 1 foot = 304.8 mm.
- Except for cavity walls and cantilevered walls, the thickness of a wall shall be its nominal thickness measured perpendicular to the face of the wall. For cavity walls, the thickness shall be determined as the sum of the nominal thicknesses of the individual wythes. For cantilever walls, except for parapets, the ratio of height to nominal thickness shall not exceed 6 for solid masonry, or 4 for hollow masonry. For parapets, see Section R606.4.4.
- An additional unsupported height of 6 feet is permitted for gable end walls.