Section 408.40203. Definitions.

(1) "Base" means the supporting surface that the masonry wall is laid upon.

(2)    "Competent person" means a  person  who   is  trained,  experienced, and capable of identifying existing or potential hazards in surroundings, or under working conditions, that are hazardous or dangerous to an employee and who has the authority and knowledge to take prompt corrective   measures to eliminate the hazards.

(3)     "Controlling contractor" means a prime contractor, general contractor, construction manager, or  any  other   legal  entity  that  has the  overall responsibility for the construction of the  project    including its planning, quality, and completion.

(4)    "Initial period" means the period of time, not to exceed 24  hours, during which the masonry wall is being laid above its base or  the  highest line  of bracing and, at the end of which, required bracing is installed.

(5)    "Intermediate period" means the  period   of   time   following   the initial period until the masonry  wall  is   connected  to  the   structural elements  that provide its final lateral support.

(6)   "Qualified person" means a person who, by  possession  of   a recognized degree, certificate, professional standing, or by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter, the work, or the project.

(7)   "Reinforced masonry" means a masonry wall made up of units laid in mortar with steel reinforcement embedded in grout.

(8)   "Restricted zone" means the area on each  side   of  a  masonry  wall measured by a horizontal distance equal to the height of the constructed wall plus a minimum of 4 feet, measured at right angles to the  wall,  and continuing  for the length of the wall plus a minimum of 4  feet beyond the ends of the wall.

(9)       "Structural  designer  of   record"  means  a    registered   or licensed professional who is responsible for the structural design of the project.

(10)   "Unreinforced masonry" means a masonry wall made up of units laid in mortar that may contain horizontal joint reinforcement.

(11)   "Unsupported masonry wall" means  a   masonry  wall  that  has   not obtained its final lateral support from structural elements, such as, but not limited to, roofs, floors, buttresses, crosswalls, and piers.

(12)   "Wall bracing system" means a  brace  consisting  of   vertical, diagonal, and/or horizontal structural elements which provide support to the unsupported masonry wall.

(13)    "Wind-measuring  device"   means  an  instrument   which  accurately measures wind speed to + 2 miles per hour.

(14)   "Wind speed" means the velocity of a 3-second gust.

History: 1989 AACS; 2010 AACS.