Loose-leaf Supplement Chapter 3 - Broward …

1 Board of Rules and Appeals FBC 6th edition (2017)- Mechanical - Supplement No. 1 January 1, 2018 Broward County Board of Rules and Appeals One North University Drive Suite 3500 B, Plantation, florida 33324 - Phone: 954 -765-4500 Website: florida building Code 6th edition (2017) Mechanical Broward County edition Loose-leaf Supplement Insert and maintain this instruction sheet in front of the florida building Code, 6th edition (2017) Mechanical. File removed pages for reference. Mechanical - Remove Old Pages Mechanical - Insert New Pages Chapter 3 - Page 21-22 Chapter 9 - Page 83-84 Chapter 3 - Page 21-22 Chapter 9 - Page 83-84 Highlight of changes: to Section to Section to Section to Section to Section page is intentionally left REGULATIONSFLORIDA building CODE MECHANICAL, 6th edition (2017)21withstanding 100 pounds per square foot ( kg/m2).

2 Landing dimensions shall be not less than 18inches (457 mm) and not less than the width of theladder served. A guard rail shall be provided on allopen sides of the Climbing clearance. The distance from the centerlineof the rungs to the nearest permanent object on theclimbing side of the ladder shall be not less than 30inches (762 mm) measured perpendicular to therungs. This distance shall be maintained from thepoint of ladder access to the bottom of the roof minimum clear width of 15 inches (381 mm) shallbe provided on both sides of the ladder measuredfrom the midpoint of and parallel with the rungsexcept where cages or wells are Landing required. The ladder shall be provided witha clear and unobstructed bottom landing area having aminimum dimension of 30 inches (762 mm) by 30inches (762 mm) centered in front of the Ladders shall be protected against corrosion byapproved Access to ladders shall be provided at all installed to provide the required access shall benot less than 24 inches (610 mm) wide and shall have railingsas required for service : This section shall not apply to Group Sloped roofs.

3 Where appliances, equipment, fansor other components that require service are installed on aroof having a slope of three units vertical in 12 units hori-zontal (25-percent slope) or greater and having an edgemore than 30 inches (762 mm) above grade at such edge, alevel platform shall be provided on each side of the appli-ance or equipment to which access is required for service,repair or maintenance. The platform shall be not less than30 inches (762 mm) in any dimension and shall be pro-vided with guards. The guards shall extend not less than42 inches (1067 mm) above the platform, shall be con-structed so as to prevent the passage of a 21-inch-diameter(533 mm) sphere and shall comply with the loadingrequirements for guards specified in the florida BuildingCode, building . Access shall not require walking on roofshaving a slope greater than four units vertical in 12 unitshorizontal (33-percent slope).

4 Where access involvesobstructions greater than 30 inches (762 mm) in height,such obstructions shall be provided with ladders installedin accordance with Section or stairways installed inaccordance with the requirements specified in the FloridaBuilding Code, building in the path of travel to and fromappliances, fans or equipment requiring Electrical requirements. A receptacle outlet shallbe provided at or near the equipment location in accor-dance with NFPA 307 CONDENSATE Fuel-burning appliances. Liquid combustion by-prod-ucts of condensing appliances shall be collected and dis-charged to an approved plumbing fixture or disposal area in accordance with the manufacturer s installation instructions. Condensate piping shall be of approved corrosion-resistant material and shall not be smaller than the drain connection on the appliance.

5 Such piping shall maintain a minimum hori-zontal slope in the direction of discharge of not less than one-eighth unit vertical in 12 units horizontal (1-percent slope). Evaporators and cooling coils. Condensate drain sys-tems shall be provided for equipment and appliances contain-ing evaporators or cooling coils. Condensate drain systems shall be designed, constructed and installed in accordance with Sections through from cooling coils and evaporators is not required to be collected and conveyed to an on-site cooling tower; provided through are met: The equipment comprises 10% or less of the total capacity of the cooling tower The equipment is located in an isolated or remote The size of the equipment is 65,000 Btu/hr. or existing buildings condensate may be collected and conveyed to a cooling tower or discharged to an approved place of Drain pipe materials and sizes.

6 Components of the condensate disposal system shall be cast iron, galva-nized steel, copper, cross-lin ked polyethylene, polyeth-ylene, ABS, CPVC, PVC, or polypropylene pipe or tubing. Components shall be selected for the pressure and temperature rating of the installation. Joints and connec-tions shall be made in accordan ce with the applicable provisions of Chapter 7 of the florida building Code, Plumbing relative to the material type. Condensate waste and drain line size shall be not less than 3/4 inch( mm) internal diameter and shall not decrease in size from the drain pan connection to the place of condensate disposal. Where the drain pipes from more than one unit are mani-folded together for condensate drainage, the pipe or tubing shall be sized in accordance with Table.

7 TABLE DRAIN SIZING1 inch = mm, 1 ton = kW. EQUIPMENT CAPACITYMINIMUM CONDENSATEPIPE DIAMETERUp to 20 tons of refrigeration 3/4 inchOver 20 tons to 40 tons of refrigeration 1 inchOver 40 tons to 90 tons of refrigeration 11/4 inchesOver 90 tons to 125 tons of refrigeration 11/2 inchesOver 125 tons to 250 tons of refrigeration 2 inchesAdopted: October 12, 2017 Effective: January 1, 2018 Exception: Evaporators and cooling coils that are designed to operate in sensible cooling only and not support condensation shall not be required to meet the requirements of this Condensate drainage collection, use or disposal. Condensate from all coolin g coils and evaporators of equipment served by an onsite cooling tower in a building or structure wherein the aggregate cooling capacity of the equipment exceeds 65,000 Btu/hr shall be collected and conveyed from the drain pan outlet and discharged to the cooling tower.

8 Where an on-site cooling tower is not installed the condensate from all cooling coils and evaporators shall be conveyed from the drain pan outlet to an approved place of disposal. Such piping shall maintain a minimum horizontal slope in the direction of discharge of not less than one-eighth unit vertical in 12 units horizontal (1-percentslope). Condensate shall nnot discharge into a street, alley or other areas as to cause a :GENERAL Auxiliary and secondary drain systems. In addi-tion to the requirements of Section , where damageto any building components could occur as a result ofoverflow from the equipment primary condensate removalsystem, one of the following auxiliary protection methodsshall be provided for each cooling coil or fuel-fired appli-ance that produces condensate:1.

9 An auxiliary drain pan with a separate drain shall beprovided under the coils on which condensation willoccur. The auxiliary pan drain shall discharge to aconspicuous point of disposal to alert occupants inthe event of a stoppage of the primary drain. The panshall have a minimum depth of 11/2 inches (38 mm),shall be not less than 3 inches (76 mm) larger thanthe unit, or the coil dimensions in width and lengthand shall be constructed of corrosion-resistant mate-rial. Galvanized sheet steel pans shall have a mini-mum thickness of not less than inch ( ) (No. 24 gage). Nonmetallic pans shall have aminimum thickness of not less than inch ( ).2. A separate overflow drain line shall be connected tothe drain pan provided with the equipment. Suchoverflow drain shall discharge to a conspicuouspoint of disposal to alert occupants in the event of astoppage of the primary drain.

10 The overflow drainline shall connect to the drain pan at a higher levelthan the primary drain An auxiliary drain pan without a separate drain lineshall be provided under the coils on which conden-sate will occur. Such pan shall be equipped with awater-level detection device conforming to UL 508that will shut off the equipment served prior to over-flow of the pan. The auxiliary drain pan shall beconstructed in accordance with Item 1 of this A water-level detection device conforming to UL508 shall be provided that will shut off the equip-ment served in the event that the primary drain isblocked. The device shall be installed in the primarydrain line, the overflow drain line, or in the equip-ment-supplied drain pan, located at a point higherthan the primary drain line connection and below theoverflow rim of such : Fuel-fired appliances that automaticallyshut down operation in the event of a stoppage in thecondensate drainage Water-level monitoring devices.