1217.5 Poured Floor Structural Concrete Slab Sys-tems

Where tubing is embedded in a structural concrete slab such tubes shall not be larger in outside dimension than one-third of the overall thickness of the slab and shall be spaced not less than three diameters on center except within 10 feet (3048 mm) of the distribution manifold. The top of the tubing shall be embedded in the slab not less than 2 inches (51 mm) below the surface.

tion.1217.5.1 Slab Penetration Tube and Joint Protec- Where embedded in or installed under a concrete slab, tubing shall be protected from damage at penetra

« «

as hallways and indoor swimming pools.

2019 CALIFORNIA MECHANICAL CODE 245

HYDRONICS any other purpose or distributed to any other persons or parti es.

HYDRONICS any other

«

» » »

tions of the slab with protective sleeving approved by the tubing manufacturer. The space between the tubing and sleeve shall be sealed with an approved sealant compatible with the tubing. The tubing at the location of an expansion joint in a concrete slab shall be encased in protective pipe sleeving that covers the tubing not less than 12 inches (305 mm) on either side of the expansion joint or the tubing shall be installed below the slab. 1217.5.2 Insulation. Where a poured concrete radiant floor system is installed in contact with the soil, insulation approved for such an application with a minimum R-value of 5 shall be placed between the soil and the concrete; extend to the outside edges of the concrete; and be placed on all slab edges.

[HCD 1 & HCD 2] See California Energy Code Section 110.8(g) for insulation requirements for heated slab floors. 1217.5.3 Joist Systems and Subfloors. Where tubing is installed below a subfloor, the tube spacing shall be in accordance with the system design and joist space limitations.

1217.6.1 Electric Heating Panel Systems. Clearances for electric heating panels or between outlets, junction boxes, mounting luminaries, ventilating, or other openings shall comply with the California Electrical Code .

1217.6.2 Radiant Wall and Ceiling Panels. Radiant panels attached to wood, steel, masonry, or concrete framing members shall be fastened by means of anchors, bolts, or approved screws of sufficient size and anchorage to support the loads applied. Panels shall be installed with corrosion-resistant fasteners. Piping systems shall be designed for thermal expansion to prevent the load being transmitted to the panel.