Virginia Administrative Code › Title 6 - CRIMINAL JUSTICE AND CORRECTIONS › Agency 15 - STATE BOARD OF LOCAL AND REGIONAL JAILS › Chapter 81 - STANDARDS FOR PLANNING, DESIGN, CONSTRUCTION, AND REIMBURSEMENT OF LOCAL CORRECTIONAL FACILITIES › Part V - Secure Local Correctional Facilities Design and Construction › Article 4 - Construction Requirements › Section 6VAC15-81-930 - Structural systems - walls, floors, roofs, ceilings

Current through Register Vol. 40, No. 24, July 15, 2024
A. Wall systems - general. Walls encompassing
					 areas occupied by inmates shall provide a secure barrier for their entire
					 height and length, both horizontally and vertically, to prevent unauthorized
					 ingress or egress. Security walls shall provide continuity at adjacent security
					 walls, horizontal security barriers or the secure perimeter. The joints and
					 voids between secure walls and horizontal security barrier shall be protected
					 with materials of security level equivalent to the remainder of the wall.
1. Security walls.
a. Security perimeter walls shall be of
					 masonry, concrete, steel, or other approved noncombustible building material
					 and shall comply with ASTM F2322 testing method Grade 1 to a minimum of 1,000
					 blow counts.
b. Interior security
					 walls shall be of masonry, concrete, steel, or other approved noncombustible
					 building material and shall comply with ASTM F2322 Grade 1. Security shall be
					 maintained for the entire height of the wall and integrated with the next
					 horizontal security barrier.
c.
					 Security walls may be of the following materials and construction:
(1) Concrete masonry units with block cores
					 filled solid with 3,000 psi grout in accordance with ASTM C476. All masonry
					 mortar shall be a minimum of 2,500 psi compressive strength and comply with
					 ASTM C270.
(a) Security perimeter walls shall
					 have vertical #4 reinforcing rods in every masonry core spaced eight inches on
					 center maximum. Every masonry core shall be grout filled.
(b) Interior security walls shall have
					 vertical #4 reinforcing rods in every other masonry core spaced 16 inches on
					 center maximum. Every masonry core shall be grout filled.
(2) Concrete walls may be cast in place or
					 precast reinforced high-strength concrete panel. Walls shall be a minimum of
					 4,000 psi compressive strength (28-day break). Minimum thickness of solid core
					 concrete shall be four inches. Refer to the Prestressed/Precast Concrete
					 Institute to calculate the equivalent thickness of hollow core concrete panels.
					 Hollow core plank shall not be used for security walls.
(3) Steel wall assemblies shall meet ASTM
					 F2322 testing requirements Grade 1 or better and shall be coated with a
					 zinc-iron-alloy (galvanneal) coating meeting ASTM A653, Commercial Steel (CS),
					 coating designation A60 (Z180) designation or better. Walls shall be securely
					 anchored to structural slabs in floor, adjacent security walls, and horizontal
					 security barrier.
(4) Bar grille
					 security walls shall be 2-1/4 inches by 3/8-inch steel flat bar frame with
					 vertical 7/8-inch round double ribbed bars spaced five inches or less on center
					 with 2-1/4 inches by 3/8-inch horizontal steel bars approximately 16 inches on
					 center. Bar grille shall be securely anchored to adjacent security walls and
					 horizontal security barriers.
(5)
					 Woven rod security walls shall be fabricated from 3/8-inch diameter mild steel
					 rods spaced not more than two inches on center in two directions, interwoven,
					 and crimp-locked. Rods shall be anchored securely into a heavy gage (10-gage
					 minimum) tubular steel frame or structural equivalent flat steel bar or
					 channel. Frame shall be securely anchored to adjacent security walls and
					 horizontal security barriers.
(6)
					 Nonload bearing walls in inmate housing units less than 12 feet high shall have
					 12-gage steel continuous angles between overhead horizontal structural members
					 on both sides. Voids located at the top of the wall shall be sealed with
					 concrete masonry units grouted solid, solid concrete masonry units, or
					 3/16-inch metal plate. Walls in excess of 12 feet shall be stabilized but may
					 use clip angles in lieu of continuous angles.