2012 IMC Performing Commercial Mechanical Inspections

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2012 IMC PerformingCommercial MechanicalInspectionsBased Primarily on the 2012 InternationalMechanical Code (IMC ) and the 2012International Fuel Gas Code (IFGC ) asapplicable.

Welcome I am You are What do you do? Where are you from? How familiar are you with the IMC and/orIFGC? What do you hope to get out of this seminar?2012 IMC Performing Commercial Mechanical Inspection2

Overview General Mechanical Inspection Performing Appliance Inspection Performing Inspections of Fireplaces andSolid Fuel Appliances Performing Inspections of Piping Systems2012 IMC Performing Commercial Mechanical Inspection3

Overview Performing Ventilation Inspections Performing Inspections of Combustion AirProvisions (Gas) and NonGas Performing Venting Systems Inspections Performing Inspections of ExhaustSystems2012 IMC Performing Commercial Mechanical Inspection4

Overview Performing Inspections of Ducts andPlenums Performing Refrigeration Inspections Performing Inspections of Gas PipingInstallations2012 IMC Performing Commercial Mechanical Inspection5

Objectives Upon completion of this seminar, you willbe better able to: Define basic terms related to a commercialmechanical inspection. Describe the mechanical inspection processin a step-by-step fashion. Explain concepts of specific requirements. Determine if a given commercial occupancycomplies with the 2012 IMC and 2012 IFGC.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 16

Objectives Upon completion of this seminar, you willbe better able to: Locate and apply mechanical coderequirements. Complete inspection checklists. Utilize the 2012 IMC and 2012 InternationalFuel Gas Code (IFGC) to conduct commercialbuilding inspections.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 17

Module 1General Mechanical Inspection2012 IMC Performing Commercial Mechanical Inspection8

Performing Required GeneralInspections1. Check underground installations.IMC and IFGC Section 107.22. Check rough-in components.IMC and IFGC Section 107.23. Perform the final inspection.IMC and IFGC Section 107.24. Review evaluations and inspection reports.IMC and IFGC Section 107.2.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 9-109

Observing/Verifying TestsIMC and IFGC Section 107.31. Check for proper testing apparatusIMC and IFGC Section 107.3.22. Verify and/or observe tests.IMC and IFGC Section 107.33. Retest failures.IMC and IFGC Section 107.3.32012 IMC Performing Commercial Mechanical InspectionWorkbook Page 11-1210

Performing Clearance toCombustibles InspectionsIMC and IFGC Section 308 Two tasks:1.2.Inspect clearancesAll IMC and IFGCSection 308Inspect clearancereduction methods.IMC and IFGC Table308.62012 IMC Performing Commercial Mechanical InspectionWorkbook Page 1311

How To Measure IMC Table308.6/IFGC Table308.22012 IMC Performing Commercial Mechanical InspectionWorkbook Page 1412

Task 1: Inspect ClearancesIMC and IFGC Section 308 While performing an inspection you find afinished wood door that opens to within an inchof an appliance that requires a minimumclearance of 12 inches (305 mm). An installertries to convince you that a fire hazard is notpresent since the door is mechanically closedautomatically. As a code official, what would you do? How would you explain your position to thecontractor?2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 1413

Task 2: Inspect ClearanceReduction1. Check that reduction is allowed.IMC Section 308.22. Check listed appliances and equipment.3. Check protective assembly construction andinstallation.IMC Section 308.34. Check allowable reduction.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 15-1614

Reduced Clearance for 3 ½ -inchBrick WallFrom IMCTable 308.6and IFGCTable 308.2For SI: 1 inch 25.4 mm2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 15-1615

Reduced Clearance to CombustiblesUsing Protective Assemblies2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 15-1616

Performing Protection ofStructure InspectionsIMC and IFGC Section 302 Four tasks:1. Inspect structural safety.IMC and IFGC Section 302.12. Inspect cutting, notching and boring in woodframing.IMC and IFGC Section 302.33. Inspect alterations to trusses.IMC and IFGC Section 302.44. Inspect cutting, notching and boring in steel framing.IMC and IFCGC Section 302.52012 IMC Performing Commercial Mechanical InspectionWorkbook Page 1717

Task 1: Inspect Structural Safety1. Check for structure weakening.IMC Section 302.3.2/IFGC Section 302.3.32. Check structural condition after structuralalterations.IMC and IFGC Section 302.13. Check protection of penetrations of floor/ceilingassemblies and fire-resistance-ratedassemblies.IMC Section and IFGC 302.22012 IMC Performing Commercial Mechanical InspectionWorkbook Page 1818

Task 2: Inspect Cutting, Notchingand Boring in Wood Framing1. Check joist notching.IMC Section 302.3.1/IFGC Section 302.3.22. Check stud cutting and notching.IMC Section 302.3.2/IFGC Section 302.3.33. Check bored holes.IMC Section 302.3.3/IFGC Section 302.3.44. Check engineered wood products.IMC Section 302.3.4/IFGC Section 302.3.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 19-2019

Limitations for Cutting, Notchingand Bored Holes2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 19-2020

Bored Hole Limitations2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 19-2021

Task 3: Inspect Alterations toTrusses1. Check truss condition.IMC and IFGC Section 302.42. Check for alterations that add to loads oftrusses.IMC and IFGC Section 302.42012 IMC Performing Commercial Mechanical InspectionWorkbook Page 2122

Task 4: Inspect Cutting, Notchingand Boring in Steel Framing1. Check cutting, notching and boring holes instructural steel framing.IMC Section 302.5.1/IFGC Section 302.52. Check cutting, notching and boring holes incold-formed steel framing.IMC Section 302.5.2/IFGC Section 302.63. Check cutting, notching and boring holes innonstructural cold-formed steel wall framing.IMC Section 302.5.3/IFGC Section 302.72012 IMC Performing Commercial Mechanical InspectionWorkbook Page 2223

Module 2Performing ApplianceInspections2012 IMC Performing Commercial Mechanical Inspection24

Performing Appliance LocationInspectionsIMC and IFGC Section 303 Three tasks:1. Inspect general locations.IM and IFGC Section 303.12. Inspect indoor locations.IMC and IFGC Section 303.53. Inspect outdoor locations.IMC and IFGC Section 303.62012 IMC Performing Commercial Mechanical InspectionWorkbook Page 2525

Task 1: Inspect GeneralLocations1. Check for hazardous locations.IMC and IFGC Section 303.22. Check for prohibited locations.IMC and IFGC Section 303.33. Check for protection from damage.IMC and IFGC Section 303.42012 IMC Performing Commercial Mechanical InspectionWorkbook Page 2626

Task 2: Inspect Indoor Locations1. Check room volume.IMC and IFGC Section 303.52. Check fuel-fired furnaces and boilers installedin closets and alcoves.IMC Section 303.53. Check elevator shafts.IMC Section 303.8/IFGC Section 301.152012 IMC Performing Commercial Mechanical InspectionWorkbook Page 2727

Task 3: Inspect OutdoorLocations Check for outdoor listings and labels. Verify that any appliances that are installedoutdoors are listed and labeled for outdoorinstallation or are protected as requiredIMC and IFGC Section 303.62012 IMC Performing Commercial Mechanical InspectionWorkbook Page 2728

Public GarageIMC Section 304.6/IFGC Section 304.5Public 8 ft. Min. 1 ft. above higher than the tallest vehicle.2012 IMC Performing Commercial Mechanical Inspection29

Private GarageIMC Section 304.6/IFGC Section 304.52012 IMC Performing Commercial Mechanical Inspection30

Performing Appliance AccessInspections Five tasks:1. Inspect appliances in rooms.IMC and IFGC Section 306.22. Inspect appliances in attics.IMC and IFGC Section 306.33. Inspect appliances under floors.IMC and IFGC Section 306.44. Inspect equipment and appliances on roofs andelevated structures.IMC and IFGC Section 306.55. Inspect appliances on sloped roofs.IMC and IFGC Section 306.5.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 2831

Task 1: Inspect Appliances inRooms IMC and IFGC Section 306.21. Check for compliance with accessrequirements.IMC and IFGC Sections 306.3 thru 306.42. Check central furnaces installed incompartments or alcoves.IMC Section 306.1.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 2932

Task 2: Inspect Appliances inAttics IMC and IFGC Section 306.31. Check for compliance with accessrequirements.IMC and IFGC Section 306.32. Check for compliance with electricalrequirements.IMC Section 306.4.1/IFGC Section 306.3.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3033

Attic Location Requirements2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3034

Task 3: Inspect AppliancesUnder Floors IMC and IFGC Section 306.41. Check for compliance with accessrequirements.IMC and IFGC Section 306.42. Check for compliance with electricalrequirements.IMC and IFGC Section 306.4.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3135

Task 4: Inspect Equipment and Appliances onRoofs and Elevated Structures1. Check for permanent approved means ofaccess.IMC and IFGC Section 306.52. Check for obstacles to access and accesssafety.IMC and IFGC Section 306.53. Check permanent ladders.IMC and IFGC Section 306.54. Check catwalks.IMC and IFGC Section 306.52012 IMC Performing Commercial Mechanical InspectionWorkbook Page 32-3336

Task 5: Inspect Sloped RoofsIMC and IFGC Section 306.5.11. Check for level platforms.2. Check platform dimensions.3. Check for guards on platform.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3437

Access Platform On Roof2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3438

Guards2012 IMC Performing Commercial Mechanical Inspection39

Performing ApplianceInstallation Inspections Eight tasks:1. Examine installation information.IMC Section 304.1/IFGC Section 305.12. Resolve conflicts (if applicable).IMC Section 304.2/IFGC Section 305.13. Inspect installations having ignition sources.IMC Section 304.3/IFGC Section 305.34. Inspect ventilation for hydrogen generating andrefueling operations.IMC Section 304.5.1 /IFGC Section 703.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3540

Performing ApplianceInstallation Inspections Eight tasks (cont.):5. Inspect garages.IMC Section 304.6 /IFGC Section 305.46. Inspect for boiler and furnace rooms.IMC Section 304.8 or IFGC Section 305.6.7. Inspect for GuardsIMC Section 304.11/IFGC Section 306.68. Verify clearance from grade.IMC Section 304.10/IFGC Section 305.72012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3541

Task 1: Examine InstallationInformation1. Check the manufacturer’s installationinstructions.IMC Section 304.1/IFGC Section 305.12. Check the applicable IMC/IFGC code sections.IMC Section 304.1/IFGC Section 305.13. Compare the two.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3642

Task 2: Resolve ConflictsIMC Section 304.2 or IFGC Section 305.11. Identify if installation information containsconflicts.IMC Section 304.2/IFGC Section 305.12. Resolve the conflict.IMC Section 304.2/IFGC Section 305.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3743

Task 3: Inspect InstallationsHaving Ignition SourcesIMC Section 304.3 or IFGC Section 305.31. Check if the ignition source is located in ahazardous location. .IMC Section 304.3/IFGC Section 305.32. Check the elevation of ignition source.IMC Section 304.3/IFGC Section 305.32012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3844

Oil-fired Water Heater Installationin a Hazardous Area2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 3845

Task 4: Inspect Ventilation for HydrogenGenerating and Refueling OperationsIMC Section 304.5 or IFGC Section 703.11. Check for compliance with code requirements.IMC Section 304.4/IFGC 703.12. Check natural ventilationIMC Section 304.5/IFGC 703.1.13. Check mechanical ventilationIMC Section 304.5.2/IFGC 703.1.24. Check specially engineered installations (ifapplicable). IMC Section 304.5.3/IFGC 703.1.32012 IMC Performing Commercial Mechanical InspectionWorkbook Page 39-4046

Task 5: Inspect GaragesIMC Section 304.6 or IFGC Section 305.41. Check public garages.IMC Section 304.6/IFGC 305.42. Check private garages.IMC Section 304.7/IFGC 305.52012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4147

Appliance Installation in a PublicGarage12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4148

Task 6: Inspect Boiler andFurnace RoomsIMC Section 304.8/IFGC Section .305.6 Verify that boiler and furnace rooms areprotected as required by the InternationalBuilding Code.IMC Section 304.8/IFGC Section 305.62012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4149

Task 7: Inspect for GuardsIMC Section 304.11 or IFGC Section 306.61. Check that guards are present whererequired.2. Check guard extensions.3. Check the top of the guard(s).4. Check guard construction.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4250

Guards2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4251

Guards – Plan View2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4252

Task 8: Verify Clearance fromGrade IMC Section 304.10 and IFGC Section 305.7 Check for appliance supportsA. Verify that these appliances and equipment areinstalled on a level concrete slab or other approvedmaterial extending not less than 3 inches (76 mm)above adjoining grade.ORB. Verify that the appliance or equipment is suspendedat least 6 inches (152 mm) above adjoining grade.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4353

Module 3Performing Inspections of Fireplacesand Solid Fuel Appliances2012 IMC Performing Commercial Mechanical Inspection54

Performing Inspections of Fireplaces andSolid Fuel-burning Appliances Tasks Inspect masonry fireplaces.IMC Section 902.1 Inspect factory-built fireplaces.IMC Section 903.1 (Section 903.2 NEW) Inspect fireplace stoves and room heaters, pelletfuel appliances, and barbecue appliances.IMC Section 905.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4555

Task 1: Inspect MasonryFireplaces IMC Section 902 Check that masonry fireplaces are builtaccording to the IBC. Verify that any masonry fireplaces comply withthe masonry construction provisions of the IBC.IMC Section 902.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4756

Task 2: Inspect Factory BuiltFireplaces IMC Section 903 Check fireplace and chimney installation.IMC Section 905.2 and IFGC Section 903.1 Check hearth extensions.IMC Section 903.2 Check appliance installed in fireplaces(unvented gas log).IMC Section 903.3 and UL 1272012 IMC Performing Commercial Mechanical InspectionWorkbook Page 47-4857

Typical Factory-build FireplaceWith Hearth2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 4758

Task 3: Inspect Fireplace Stoves and RoomHeaters, Pellet Fuel Appliances and Barbecueappliances IMC Section 9061. Check installation.IMC Section 3905/IFGCSection 6022. Check for pellet fuelburning appliances ventconnection. IMC Section9043. Check barbecueappliances for compliancewith IMC Section 906 andIFGC Section 623.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 48-4959

Module 4Performing Inspections ofPiping Systems2012 IMC Performing Commercial Mechanical Inspection60

Four Parts Performing inspections of hydronic pipingIMC Chapter 12 Performing inspections of refrigerant pipingIMC Chapter 11 Performing inspections of condensate pipingIMC Section 307/IFGC Section 307 Performing inspections of fuel piping andstorage systemsIMC Chapter 132012 IMC Performing Commercial Mechanical InspectionWorkbook Page 5161

Performing Inspections ofHydronic Piping IMC Chapter 12 Three tasks: Inspect piping materials.IMC Section 1202 Inspect piping installation.IMC Section 1204 Inspect transfer fluid.IMC Section 12072012 IMC Performing Commercial Mechanical InspectionWorkbook Page 5162

Performing Inspections ofRefrigerant Piping IMC Chapter 11 Three tasks:1. Inspect piping materials.IMC Section 11072. Inspect joints.IMC Section 1107.63. Inspect stop valves.IMC Section 1107.82012 IMC Performing Commercial Mechanical InspectionWorkbook Page 5763

Performing Inspections ofCondensate PipingIMC Section 307/IFGC Section 307 Three tasks: Inspect fuel-burning appliances.IMC Section 307.1/IFGC Section 307.2 Inspect drain pipe materials and sizes.IMC Section 307.2.2 and Table 307.2.2/IFGC Section307.3 Inspect evaporators and cooling coils.IMC Section 307.2/IFGC Section 307.12012 IMC Performing Commercial Mechanical InspectionWorkbook Page 6164

Task 1: Inspect Fuel BurningAppliance Drain1. Check collection and discharge.IMC Section 307.1/IFGC Section 307.2.2. Check horizontal slope.IMC Section 307.1/IFGC Section 307.2.3. Check for corrosion resistance.IMC Section 307.1/IFGC Section 307.3.4. Check drain size.IMC Section 307.2.2 and Table 307.2.2/IFGCSection 307.3.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 6265

Task 2: Inspect Drain PipeMaterials and Sizes1. Check component materials.IMC Section 307.2.2/IFGC Section 307.3.2. Check material selection.IMC Section 307.2.2/IFGC Section 307.3.3. Check condensate waste and drain line size.IMC Section 307.2.2and Table 307.2.2/IFGCSection .2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 6366

Task 3: Inspect Evaporators andCooling Coils1. Check condensate disposal point.IMC Section 307.2.12. Check auxiliary and secondary drain systems.IMC Section 307.2.3/IFGC Section 307.5.3. Check traps.IMC Section 307.2.4/IFGC Section 307.4.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 6467

Performing Inspections of FuelPiping and Storage SystemsIMC Chapter 13 Three tasks:1. Inspect fuel oil piping.IMC Table 305.4 and 1302.3.2. Inspect fuel gas piping (IFGC Chapter 4).3. Inspect hydrogen piping.IMC Table 305.4 and IFGC Section 704, 705.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 6568

Task 1: Inspect Fuel Oil Piping1. Check for IFCcompliance.IMC Section 1301.1.2. Check materials.IMC Section 1302.3. Check joints andconnections.IMC Section 1303.4. Check fuel oilsystem installation.IMC Section 1305and 1305.2.1.5. Check fill piping.IMC Section 1305.6.6. Check vent piping.IMC Section 1305.7 .2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 66-6869

Task 2: Inspect Fuel Gas PipingIFGC Chapter 41. Identify piping and components owned bythe gas utility company.2. Check materials and components.3. Check installation.4. Check sizing of gas piping.5. Check gas flow controls.6. Check appliance connections.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 69-7270

Task 3: Inspect Hydrogen PipingIFGC Section 7011.2.3.4.5.Check piping. IFGC Section 704Check use. IFGC Section 704.2Verify tests. IFGC Section 705Check location. IFGC Section 706Check for IFC compliance. IFGC Section 704.32012 IMC Performing Commercial Mechanical InspectionWorkbook Page 73-7471

Module 5Performing VentilationInspections2012 IMC Performing Commercial Mechanical Inspection72

Four Tasks1. Inspect exit enclosure ventilation.IMC Section 601.3 (IMC 401.2 has NEWcontent)2. Inspect openings.IMC Section 401.43. Inspect natural ventilation.IMC Section 4024. Inspect mechanical ventilation.IMC Section 4032012 IMC Performing Commercial Mechanical InspectionWorkbook Page 7573

Task 1: Inspect Exit EnclosureVentilation1. Check intake openings.IMC Section 401.42. Check exhaust openings.IMC Section 501.3.1.3. Check opening protection.IMC Section 401.5.4. Check contaminant sources.IMC Section 401.6.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 77-7874

Air Intake Opening LocationsFor SI: 1 inch 25.4 mm, 1 foot 304.8 mm2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 77-7875

Task 2: Inspect Openings1. Check intake openings (IMC Section 401.4 Ventilation).2. Check exhaust openings (IMC Section 501.3.1- Exhaust).3. Check opening protection (IMC Table 401.5).4. Check contaminant sources (IMC Section401.6).2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 79-8076

Economizer2012 IMC Performing Commercial Mechanical Inspection77

Task 3: Inspect NaturalVentilation1. Check for natural ventilation openings.IMC Section 402.1.2. Check ventilation area required.IMC Section 402.2.3. Check adjoining spaces.IMC Section 402.3.4. Check openings below grade (if present).IMC Section 402.4.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 8178

Task 4: Inspect MechanicalVentilation1. Check the ventilationmeans.IMC Section 403.1.2. Determine theventilation rate.IMC Table 403.3.3. Check the ventilationrate.IMC Table 403.3. 4. Check therecirculation of air.IMC Section 403.2.1.5. Check transfer air, ifbeing utilized.IMC Section 403.2.2.6. Check commonventilation systems.IMC Section 403.2.32012 IMC Performing Commercial Mechanical InspectionWorkbook Page 82-9679

Table403.3RequiredOutdoorVentilationAir2012 IMC Performing Commercial Mechanical Inspection80

Table 403.3RequiredOutdoorVentilationAir2012 IMC Performing Commercial Mechanical Inspection81

Table 403.3RequiredOutdoorVentilationAir2012 IMC Performing Commercial Mechanical Inspection82

Example 1: Single-zoneRecirculating System A 3,000-square-foot dining room is servedby a rooftop air-handling unit by means ofducted ceiling supply registers and ceilingreturn grilles. Determine the systemoutdoor air intake flow rate (Vot) for thedining room.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9683

Example 1: Single-zoneRecirculating System Application This dining room with a single rooftop unit isconsidered to be a single-zone system. In order todetermine the outdoor air intake flow rate (Vot) for asingle-zone system using Equation 4-3, the breathingzone airflow rate (Vbz) of the occupied space mustfirst be determined using Equation 4-1. Then, thezone airflow effectiveness (Ez) must be determined inaccordance with Table 403.3.1.2. Next, the zoneoutdoor airflow rate (Voz) must be determined usingEquation 4-2. The outdoor air intake flow rate for asingle-zone system is then simply Vot Voz, Equation4-3.2012 IMC Performing Commercial Mechanical Inspection84Workbook Page 87-96

Example 1: Single-zoneRecirculating System Step 1: Determine occupant load (Pz) forthe room for use in Equation 4-1:Vbz RpPz RaAz From Table 403.3 for dining rooms, theoccupant density of 70 occupants/1,000 ft2 isused: 3,000 ft2 70 1,000 ft2 210 occupants Pz2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9685

Example 1: Single-zoneRecirculating System Step 2: Determine the breathing zone outdoor airflow(Vbz) for the room: First, the outdoor air rates for people (Rp) and area(Ra) must be obtained for the dining room from Table403.3: Rp 7.5 cfm/person and Ra 0.18 cfm/ft2 Equation 4-1 can now be solved: Vbz RpPz RaAz Vbz (7.5 cfm/person 210 people) (0.18 cfm/ft2 3,000 ft2) Vbz 2,115 cfm2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9686

Example 1: Single-zoneRecirculating System Step 3: Determine the zone outdoorairflow (Voz): It is given that the room is served by a rooftop airhandling unit by means of ducted ceiling supplyregisters and ceiling return grilles. Thus, the zoneair distribution effectiveness (Ez) can be obtainedfrom Table 403.3.1.2. In cooling mode, Ez 1.0,and in heating mode, Ez 0.8. The mostrestrictive value, Ez 0.8, must be used (assumethat Note g of Table 403.3.1.2 does not apply).2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9687

Example 1: Single-zoneRecirculating System Step 3: Determine the zone outdoorairflow (Voz): Equation 4-2 can now be solved for the room:Voz VbzEzCooling Mode: Voz 2,1151.0 2,115 cfmHeating Mode: Voz 2,1150.8 2,644 cfm2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9688

Example 1: Single-zoneRecirculating System Step 3: Determine the zone outdoor airflow (Voz): As a result, the greater system demand for the dining roomrequires 2,644 cfm of outdoor air in heating mode. Thisvalue of Voz should be used to determine the maximumsystem requirement for outdoor air intake flow rate (Vot),Equation 4-3:Vot Voz 2,644 cfm In comparison, the amount of outdoor air required usingthe 2006 code would be based on the same occupantload. However, the outdoor air ratio is 20 cfm per person.Therefore, the amount of outdoor air is 210 occupants 20 cfm/occupant 4,200 cfm of outdoor air required.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9689

Example 2: Multiple-zoneRecirculating Systems A single-story 8,000-square-foot office buildingconsists of 7,250 square feet of general officespace and a 500-square-foot conference room. The building is served by a rooftop unit by meansof ducted ceiling supply registers and ceiling returngrilles. The primary airflow provided by the rooftopunit is 8,100 cfm for the office space and 780 cfmfor the conference room. Determine the outdoorair intake flow rate for the system serving theoffice area and conference room.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9690

Example 2: Multiple-zoneRecirculating Systems Application This office area and conference room constitutes twoseparate zones that are served by a single rooftopunit. In order to determine the outdoor air intake flowrate (Vot) for a multiple-zone system using Equation 48, the breathing zone airflow rate (Vbz) of the occupiedspace must first be determined using Equation 4-1.Then, the zone airflow effectiveness (Ez) must bedetermined in accordance with Table 403.3.1.2. Next,the zone outdoor airflow rate (Voz) must bedetermined using Equation 4-2.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9691

Example 2: Multiple-zoneRecirculating Systems Application After determining the previously listed variables, theoutdoor air intake flow rate for amultiple-zonerecirculating system must be determined usingSections 403.3.2.3.1 through 403.3.2.3.4. The primaryoutdoor air fraction (Zp) must be determined usingEquation 4-5. Then the system ventilation efficiency(Ev) is determined in accordance with Table403.3.2.3.2 and the uncorrected outdoor air intakeflow rate (Vou) is determined using Equations 4-6 and4-7.2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9692

Example 2: Multiple-zoneRecirculating Systems Step 1: Determine occupant loads (Pz) for eachzone: For the general office space (Zone 1), theoccupant density of 5 occupants/1,000 ft2 is used(from Table 403.3 for office spaces). Pz (Zone 1) 7,250 ft2 5 occupants/1,000 ft2 37 For the conference room (Zone 2), the occupantdensity of 50 occupants/1,000 ft2 is used. Pz (Zone 2) 500 ft2 50 occupants/1000 ft2 252012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9693

Example 2: Multiple-zoneRecirculating Systems Step 2: Determine the breathing zone outdoorairflow (Vbz) for each zone: First, the outdoor air rates for people (Rp) and area(Ra) must be obtained for each zone from Table403.3: Zone 1 values: Rp (Zone 1) 5 cfm/person and Ra (Zone 1) 0.06 cfm/ ft2 Zone 2 values: Rp (Zone 2) 5 cfm/person and Ra (Zone 2) 0.06 cfm/ ft22012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9694

Example 2: Multiple-zoneRecirculating Systems Step 2: Determine the breathing zone outdoorairflow (Vbz) for each zone: Equation 4-1 can now be solved for each zone: Vbz RpPz RaAz Zone 1: Vbz (5 cfm/person 37 people) (0.06cfm/ft2 7,250 ft2) Vbz 620 cfm Zone 2: Vbz (5 cfm/person x 25 people) (0.06cfm/ft2 500 ft2) Vbz 155 cfm2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9695

Example 2: Multiple-zoneRecirculating Systems Step 3: Determine the zone outdoorairflow (Voz) for each zone: It is given that the room is served by a rooftopair-handling unit by means of ducted ceilingsupply registers and ceiling return grilles.Thus, the zone air distribution effectiveness(Ez) can be obtained from Table 403.3.1.2. Incooling mode, Ez 1.0, and in heating mode,Ez 0.8 (assume that Note g of Table403.3.1.2 does not apply).2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9696

Example 2: Multiple-zoneRecirculating Systems Equation 4-2 can now be solved for each zone:Voz Vbz/EzEzZone 1: Cooling Mode: Voz 620 cfm1.0 620 cfmHeating Mode: Voz 620 cfm0.8 775 cfmZone 2: Cooling Mode: Voz 155 cfm1.0 155 cfmHeating Mode: Voz 155 cfm0.8 194 cfm2012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9697

Example 2: Multiple-zoneRecirculating Systems Step 4: Determine the primary outdoor airfraction (Zp) for each zone: The primary airflow (Vpz) is given:Vpz (Zone 1) 8,100 cfm and Vpz (Zone 2) 780 cfm.Equation 4-5 can now be solved for each zone:Zp VozVpzZone 1: Zp 775 cfm/8,100 cfm 0.096Zone 2: Zp 194 cfm/780 cfm 0.252012 IMC Performing Commercial Mechanical InspectionWorkbook Page 87-9698

Example 2: Multiple-zoneRecirculating Systems Step 5: Determine the system ventilationefficiency (Ev): The larg

IMC and IFGC Section 306.5 2. Check for obstacles to access and access safety. IMC and IFGC Section 306.5 3. Check permanent ladders. IMC and IFGC Section 306.5 4. Check catwalks. IMC and IFGC Section 306.5 Workbook Page 32-33 2012 IM

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Step 4: All standard IMC shipments must be shipped on the specified IMC Overseas Block Pallet 960mm x 1140mm (38" x 45"). In case that the IMC carton size exceeds the dimensions of the standard pallet then a special pallet with same foot print size of the carton used is required .This special pallet must follow the same construction

IMC Done Elsewhere Tier 4 Out of Network ‐ Individual 2,500 3,000 6,000 6,000 0 1,500 4,000 5,000 ‐ Family 5,000 6,000 12,000 12,000 No Family Deductible Out‐of‐Pocket Max Tier 1 IMC Tier 2 In Network Tier 3 Available at IMC Done Elsewhere Tier 4 Out of Network

imc STUDIO - the modular software for measurement, control and automation Whether you want to use your imc imc CRONOSflex in a "black box" configuration for easy data acquisition, or you want to set up Live-Monitoring on hundreds of channels during prototype testing, or you want to create a

in VMC and an ILS in simulated IMC. The advanced operational concept was an IMC maneuver that used the same flight path flown for the conventional VFR traffic pattern approach; however, this "VMC-like" approach was flown in simulated IMC. Figure 5 shows a gods-eye-view of the evaluation maneuvers. The VFR traffic pattern incorporated a

imc CANSAS is the ideal tool for achieving cost effec-tive, high precision decentralized measurements and control. High channel count, centralized systems also benefit from the imc CANSAS design: rack mountable, par-allel acquisition and easy module interchangeability are key features which make imc CANSAS popular for

Answer Key A Beast / Post-Reading / Activity 1 Hand out the worksheets to your students. Ask them to draw and describe the beast. When they finish, ask the students to walk around the class, find a partner, and then show and say what they have written. Display their worksheets on the bulletin board. Possible answer: The beast has got a very long body with brown spots A Beast / Post-Reading .