Committee Responsibilities Matrix 2018 International Plumbing Code February 2017

Transcription

1 Subject Administrative Provisions Chapter 1 Defined Terms Chapter 2 Alterations to trusses 2018 Chapter 1 Chapter 2 Committee Responsibilities Matrix Maintained by ADM Various Maintained by Proposed Change See ADM SCOPING PROPOSAL See DEFINITIONS SCOPING PROPOSAL IBC: S No proposed Comments/Justifications Flood hazard IBC: S No proposed Coastal high hazard areas and coastal A zones Fuel burning appliances Evaporators and cooling coils Condensate disposal Drain pipe material and sizes IBC: S No proposed IMC No proposed IMC No proposed IMC No proposed IMC No proposed Page 1 of 11

2 Subject Condensate Drain Sizing Table Table Maintained by IMC Maintained by Proposed Change No proposed Comments/Justifications No scoping. This was missing from prior scoping lists. Auxiliary and secondary drain systems Water-level monitoring devices Appliance, equipment and insulation in pans IMC No proposed IMC No proposed IMC No proposed Traps IMC No proposed Ductless minisplit system traps IMC No proposed Cleanouts Drain line maintenance Provide High and low drinking fountains IMC No proposed IBC-MOE No proposed No scoping. Simply a correction of section title to align with IMC section title. No scoping. Correction of section title and correction of scoping designation on this sheet. Page 2 of 11

3 Subject Surrounding material Unfired vessel insulation Circulation systems and heat trace systems for maintaining heated water temperature in distribution systems. Pump controls for hot water storage systems Demand recirculation controls for water distribution systems Maintained by Maintained by Proposed Change Comments/Justifications IBC-G was deleted by P67-15 AS IECC No proposed See Comment Note #4 at the end of this table IPC IECC See Change Justification Note #1 at the end of this table IPC IECC-CE See Change Justification Note # 2 at the end of this table IPC IECC See Change Justification Note # 3 at the end of this table. Page 3 of 11

4 Subject Insulation of piping Committee Responsibilities Matrix Maintained by Maintained by Proposed Change IECC No proposed Comments/Justifications Roof design IPC IBC: S See Change Justification Note # 5 at the end of this table. Medical gases- Nonflammable medical gases Oxygen Systems- Design and IFC No proposed IFC No proposed installation a. Legend for Control Type : 1. No corresponding section in the controlling code 2. Corresponding to in controlling code, not identical wording 3. Identical to in the controlling code ORANGE NUMBERS INDICATE Numbering To be revised after 2018 codes are published. Page 4 of 11

5 SCOPING CHANGE COMMENTS/JUSTIFICATION NOTES Note 1: This is the 2018 IPC section: Circulation systems and heat trace systems for maintaining heated water temperature in distribution systems. For Group R2, R3 and R4 occupancies that are three stories or less in height above grade plane, the installation of heated water circulation and temperature maintenance systems shall be in accordance with R of the International Energy Conservation Code. For other than Group R2, R3 and R4 occupancies that are three stories or less in height above grade plane, the installation of heated water circulation and heat trace systems shall be in accordance with C404.6 of the International Energy Conservation Code. This code section was significantly modified from the IPC by proposal CE Part II. The purpose of the section is to point IPC users to the appropriate Commercial Energy and Residential Energy sections for the required insulation of piping (a topic that within the scope of the IECC). As the IPC is the plumbing code for all IBC (commercial) buildings, it might seem that would not be necessary. However, the IECC splits its coverage into Commercial buildings [CE] and low rise Residential buildings [RE], other than IRC buildings. The piping insulation schemes are vastly different between CE and RE. And, this scope split between CE and RE has the possibility to with each code cycle (as almost happened in 2016). Because the IECC code development cycle occurs a year after the code development cycle of the IPC, it is difficult to ensure that this section will continue to correctly reflect any Page 5 of 11

6 scope split s in the IECC. Having this section with an [E] scoping allows proponents in the energy code development cycle to propose correct language within that same cycle. Note 2: This is the 2018 IPC section: Pump controls for hot water storage systems. The controls on pumps that circulate water between a water heater and a storage tank for heated water shall limit operation of the pump from heating cycle startup to not greater than 5 minutes after the end of the cycle. This language is identical to an IECC-CE code section. The section was new in both the IPC and the IECC-CE as the result of a CE proposal. The purpose of this section is to limit pump energy for these types of circulating systems. There could be future control technology that might further reduce pump energy use and having the IECC control this section appears to be more in the scope of the IECC than the IPC. Because the IECC code development cycle occurs a year after the code development cycle of the IPC, it is difficult to ensure that this section will continue to correctly reflect s in the IECC. Having this section with an [E] scoping allows proponents in the energy code development cycle to propose correct language within that same cycle or at the very least, allows the Code Correlation Committee the opportunity to make language corrections in the same code development year as the IECC. Page 6 of 11

7 Note 3: This is the 2018 IPC section: Demand recirculation controls for distribution systems. A water distribution system having one or more recirculation pumps that pump water from a heated water supply pipe back to the heated water source through a cold water supply pipe shall be a demand recirculation water system. Pumps shall have controls that comply with both of the following: 1. The control shall start the pump upon receiving a signal from the action of a user of a fixture or appliance, sensing the presence of a user of a fixture, or sensing the flow of hot or tempered water to a fixture fitting or appliance. 2. The control shall limit the temperature of the water entering the cold water piping to 104 F (40 C). This language is identical to the language in both the IECC-CE and IECC-RE code sections. That language was new for the IECC and the IPC. This section was requested to be scoped to the energy code in the 2014 CCC Scoping but was denied. For the 2018 IECC, the companion sections in the CE and RE have been modified to be different than IPC How the controls of a demand water recirculation water system operate appears to be an energy code issue and not a plumbing code issue. C404.7 for the 2018 IECC has now started to diverge from the language in the 2018 IPC by CE PARTS I & II AS as follows R Demand recirculation water systems. Demand recirculation water systems shall have controls that comply with both of the following: Page 7 of 11

8 1. The controls shall start the pump upon receiving a signal from the action of a user of a fixture or appliance, sensing the presence of a user of a fixture or sensing the flow of hot or tempered water to a fixture fitting or appliance. 2. The controls shall limit the temperature of the water entering the cold water piping to not greater than 104ºF (40ºC). The revised IECC section is more of a word-smithing than it is of technical substance. It could have been much more complicated and technically different such that a conflict between the IECC and the IPC could have occurred. This is the reason why in the 2014 CCC Scoping meeting, it was requested to have this section scoped to the IECC. That request was disapproved for unknown reason. Again, it is recommended that the IPC section is scoped to the IECC so that future s in the IECC sections are automatically reflected in this IPC section. Note 4: This is informational only to support a of the Control Type. The 1995 IPC and 1995 IECC (commercial energy chapter only) included language concerning heat loss from unfired hot water storage tanks. In the year 2000, this in the IPC was scoped to [E]. In the 2012 edition, the IECC was split into separate (but bound together) CE and RE codes. The CE code continues with the requirement (in Table C404.2) to support the IPC requirements. However, there is not a corresponding requirement in the RE code. It is believed that the [E] scoping is correct. Therefore, I am advising the CCC that the Control Type will be noted in this way: Page 8 of 11

9 CE:2-Table C404.2 RE: 1 to continue the support of the [E] scoping. (Otherwise, the scoping could be d to [CE] but that might bring into question as to whether this section is intended to apply only to buildings where the CE code is applied, and not to commercial buildings where the RE code is sometimes required to be applied.) Note 5: This section is concerned about the conditions that a building roof has to be designed for with respect to rainwater that falls on the roof Roof design. Roofs shall be designed for the maximum possible depth of water that will pond thereon as determined by the relative levels of roof deck and overflow weirs, scuppers, edges or serviceable drains in combination with the deflected structural elements. In determining the maximum possible depth of water, all primary roof drainage means shall be assumed to be blocked. The maximum possible depth of water on the roof shall include the height of the water required above the inlet of the secondary roof drainage means to achieve the required flow rate of the secondary drainage means to accommodate the design rainfall rate as required by Page 9 of 11

10 Most of the language (except for the last sentence) comes from IBC : ( IBC) Design rain loads. Each portion of a roof shall be designed to sustain the load of rainwater that will accumulate on it if the primary drainage system for that portion is blocked plus the uniform load caused by water that rises above the inlet of the secondary drainage system at its design flow. The design rainfall shall be based on the 100- year hourly rainfall rate indicated in Figure or on other rainfall rates determined from approved local weather data. R = 5.2(d s + d h ) (Equation 16-19) However, for the 2018 IPC, the IBC section was revised to: (2018 IBC) Design rain loads. Each portion of a roof shall be designed to sustain the load of rainwater in accordance with the requirements of Chapter 8 of ASCE 7. The design rainfall shall be based on the 100-year, 15- minute duration event, which is twice the 100-year hourly rainfall rate indicated Figure or on other rainfall rates determined from approved local weather data. R = 5.2(d s + d h ) (Equation 16-19) Roof design is not within the IPC scope although the information in IPC is useful for indicating that the design of roof drainage means is a collaborative effort between the building (roof) structural designer and the designer of storm water outlet means for the roof. In Page 10 of 11

11 this cycle, the design rainfall event according to the IBC has doubled to what is indicated in IPC This is conflicting information that could have been avoided had the IPC section been scoped to [BS]. It is recommended that the IPC section be scoped to [BS] to avoid this problems in the future. Page 11 of 11