# Nordix > Nordix is a bid-to-closeout operations console for commercial and industrial trade contractors: estimating, job operations, and closeout, with finished-job actuals feeding back into the next bid. It also publishes free trade calculators and reference charts (NEC, IPC & IBC aware). Built by an estimator, for trade contractors. ## Product - [Home](https://www.nordixhq.com/): platform overview — win the bid (estimating), run the job (operations), close the loop (actuals back into the next bid) - [About](https://www.nordixhq.com/about): who builds Nordix and why - [Full site content for LLMs](https://www.nordixhq.com/llms-full.txt): expanded version of this file — product story, per-trade prose, and every tool and chart with descriptions and code citations - Contact: sales@nordixhq.com ## Free Calculators (63 live) - [All calculators & trackers](https://www.nordixhq.com/tools) - [Electrical](https://www.nordixhq.com/tools/electrical): NEC code checks and electrical design calculators. - [Voltage Drop Calculator](https://www.nordixhq.com/tools/voltage-drop-calculator): NEC Chapter 9 Table 9 voltage drop — DC, single or three phase, raceway R/X, parallel sets, and ampacity-aware wire sizing. - [Wire Ampacity & Derating Calculator](https://www.nordixhq.com/tools/wire-ampacity-calculator): Derated ampacity from NEC Table 310.15(B)(16) with temperature and conduit-fill correction factors. - [Conduit Fill Calculator](https://www.nordixhq.com/tools/conduit-fill-calculator): Mixed conductor sizes and insulations vs the NEC Chapter 9 fill limits (53/31/40%, 60% nipple) for EMT, IMC, RMC, PVC and more — with jam-ratio check and minimum-size recommendation. - [Box Fill Calculator](https://www.nordixhq.com/tools/box-fill-calculator): NEC 314.16 box volume vs. conductor, device, and clamp allowances. - [Motor FLA Calculator](https://www.nordixhq.com/tools/motor-fla-calculator): Full-load amps from HP, voltage, and phase per NEC motor tables. - [Transformer Sizing Calculator](https://www.nordixhq.com/tools/transformer-sizing-calculator): kVA and primary/secondary amps for single- and three-phase transformers. - [Service & Load Calculator](https://www.nordixhq.com/tools/service-load-calculator): NEC dwelling/commercial load calc to size the service and main. - [Conduit Bending Calculator](https://www.nordixhq.com/tools/conduit-bend-calculator): Offsets, saddles, and 90s — multipliers, shrink, and mark distances. - [Ohm's Law & Power Calculator](https://www.nordixhq.com/tools/ohms-law-calculator): Solve volts, amps, ohms, and watts from any two known values. - [Generator Sizing Calculator](https://www.nordixhq.com/tools/generator-sizing-calculator): Running and starting kW from connected loads and motor inrush. - [Plumbing](https://www.nordixhq.com/tools/plumbing): Pipe sizing, flow, drainage, and capacity. - [Pipe Volume & Capacity Calculator](https://www.nordixhq.com/tools/pipe-volume-calculator): Gallons held per foot and total fill volume by pipe size. - [Drainage Pipe Slope Calculator](https://www.nordixhq.com/tools/pipe-slope-calculator): Fall over a run from slope (e.g. ¼" per ft) and check minimum grade. - [Water Pressure Loss Calculator](https://www.nordixhq.com/tools/pressure-loss-calculator): Friction loss through pipe and fittings at a given flow rate. - [Fixture Unit Calculator](https://www.nordixhq.com/tools/fixture-unit-calculator): Total DFU/WSFU from fixture counts to size drains and supply. - [Pipe Sizing Calculator](https://www.nordixhq.com/tools/pipe-sizing-calculator): Recommended pipe diameter from flow, length, and allowable loss. - [Tank Volume Calculator](https://www.nordixhq.com/tools/tank-volume-calculator): Capacity of cylindrical, rectangular, and oval tanks in gallons. - [GPM Flow Rate Calculator](https://www.nordixhq.com/tools/flow-rate-calculator): Flow from pipe size and velocity, or velocity from flow. - [HVAC & Mechanical](https://www.nordixhq.com/tools/hvac): Airflow, loads, duct sizing, and refrigeration. - [Duct Size Calculator](https://www.nordixhq.com/tools/duct-size-calculator): Round and rectangular duct sizing from CFM and friction rate. - [CFM & Airflow Calculator](https://www.nordixhq.com/tools/cfm-calculator): Required airflow from room volume and target air changes per hour. - [BTU & Heat Load Calculator](https://www.nordixhq.com/tools/btu-load-calculator): Quick heating/cooling load from area, climate, and construction. - [Cooling Tonnage Calculator](https://www.nordixhq.com/tools/cooling-tonnage-calculator): Convert between BTU/hr and tons of cooling to size equipment. - [Static Pressure Calculator](https://www.nordixhq.com/tools/static-pressure-calculator): Total external static pressure from duct, coil, and filter losses. - [Refrigerant Line Charge Calculator](https://www.nordixhq.com/tools/refrigerant-charge-calculator): Added charge for line-set length beyond the factory pre-charge. - [Carpentry & Framing](https://www.nordixhq.com/tools/carpentry): Lumber, framing, stairs, rafters, and decking. - [Board Foot Calculator](https://www.nordixhq.com/tools/board-foot-calculator): Board feet and cost from nominal lumber size and quantity. - [Stud & Framing Calculator](https://www.nordixhq.com/tools/stud-framing-calculator): Stud count, plates, and lineal feet from wall length and spacing. - [Stair Calculator](https://www.nordixhq.com/tools/stair-calculator): Riser height, tread depth, and stringer layout from total rise. - [Rafter & Roof Pitch Calculator](https://www.nordixhq.com/tools/rafter-calculator): Rafter length, ridge height, and plumb/seat cuts from pitch and span. - [Joist Span Calculator](https://www.nordixhq.com/tools/joist-span-calculator): Allowable spans by species, size, spacing, and load. - [Decking Calculator](https://www.nordixhq.com/tools/decking-calculator): Deck boards, joists, and fasteners from deck dimensions. - [Concrete & Masonry](https://www.nordixhq.com/tools/concrete): Volume, rebar, block, brick, and mortar takeoffs. - [Concrete Volume Calculator](https://www.nordixhq.com/tools/construction-calculator): Cubic yards for slabs, footings, and columns with bag counts. (In the Construction Calculator.) - [Rebar Weight & Spacing Calculator](https://www.nordixhq.com/tools/rebar-calculator): Bar count, total length, and weight from spacing and grid size. - [Block / CMU Calculator](https://www.nordixhq.com/tools/block-calculator): Block count, courses, and mortar for a masonry wall. - [Brick Calculator](https://www.nordixhq.com/tools/brick-calculator): Brick count and mortar from wall area and brick size. - [Mortar & Grout Calculator](https://www.nordixhq.com/tools/mortar-grout-calculator): Bags of mortar or grout for block, brick, and cell fill. - [Footing Calculator](https://www.nordixhq.com/tools/footing-calculator): Concrete volume and rebar for continuous and pad footings. - [Earthwork & Site](https://www.nordixhq.com/tools/earthwork): Excavation, cut & fill, trenching, and aggregate. - [Excavation Volume Calculator](https://www.nordixhq.com/tools/excavation-calculator): Bank cubic yards to dig from area and depth, with swell. - [Cut & Fill Calculator](https://www.nordixhq.com/tools/cut-fill-calculator): Net import or export volume from average cut and fill depths. - [Trench Volume Calculator](https://www.nordixhq.com/tools/trench-calculator): Spoil volume and bedding/backfill for a trench run. - [Aggregate & Gravel Tonnage](https://www.nordixhq.com/tools/construction-calculator): Tons of gravel, sand, or base from area, depth, and material. (In the Construction Calculator.) - [Compaction Calculator](https://www.nordixhq.com/tools/compaction-calculator): Loose vs. compacted volume and lift counts for fill placement. - [Soil Swell & Shrink Calculator](https://www.nordixhq.com/tools/soil-swell-calculator): Convert between bank, loose, and compacted soil volumes. - [Roofing & Exterior](https://www.nordixhq.com/tools/roofing): Roof area, pitch, shingles, panels, and gutters. - [Roof Area & Pitch Calculator](https://www.nordixhq.com/tools/roof-area-calculator): True roof area from footprint and pitch, with squares. - [Shingle & Bundle Calculator](https://www.nordixhq.com/tools/shingle-calculator): Bundles and squares from roof area, plus starter and ridge. - [Roof Pitch Multiplier](https://www.nordixhq.com/tools/roof-pitch-calculator): Pitch to angle, slope factor, and rafter length multiplier. - [Underlayment Calculator](https://www.nordixhq.com/tools/underlayment-calculator): Rolls of felt or synthetic from roof area and overlap. - [Metal Roofing Panel Calculator](https://www.nordixhq.com/tools/metal-roof-panel-calculator): Panel count and lineal feet from roof size and panel width. - [Gutter & Downspout Calculator](https://www.nordixhq.com/tools/gutter-calculator): Gutter footage and downspout count from roof drainage area. - [Drywall, Paint & Finishes](https://www.nordixhq.com/tools/finishes): Drywall, paint, tile, flooring, and insulation. - [Drywall Sheet Calculator](https://www.nordixhq.com/tools/drywall-calculator): Sheets, screws, and tape from wall and ceiling area. - [Paint Coverage Calculator](https://www.nordixhq.com/tools/paint-calculator): Gallons per coat from surface area, coats, and coverage rate. - [Joint Compound Calculator](https://www.nordixhq.com/tools/joint-compound-calculator): Boxes of mud and feet of tape from drywall area and finish level. - [Tile Calculator](https://www.nordixhq.com/tools/tile-calculator): Tile count, thinset, and grout from area, tile size, and waste. - [Flooring Calculator](https://www.nordixhq.com/tools/flooring-calculator): Boxes of flooring and underlayment from room area and waste. - [Insulation Calculator](https://www.nordixhq.com/tools/insulation-calculator): Batts or blown coverage and bags from area and target R-value. - [General & Shared](https://www.nordixhq.com/tools/general): Cross-trade field math, takeoffs, and estimating helpers. - [Construction Calculator](https://www.nordixhq.com/tools/construction-calculator): Concrete volume in cubic yards, aggregate & fill tonnage, plus a full unit converter (length, area, volume, weight). - [Square Footage Calculator](https://www.nordixhq.com/tools/square-footage-calculator): Area and perimeter for rectangles, triangles, and circles — with multi-room totals. - [Right-Angle (3-4-5) Calculator](https://www.nordixhq.com/tools/triangle-calculator): Square up corners and solve right triangles — diagonals, hypotenuse, and layout. - [Slope & Grade Calculator](https://www.nordixhq.com/tools/slope-grade-calculator): Convert between % grade, ratio, degrees, and rise/run for drainage and ramps. - [Markup & Margin Calculator](https://www.nordixhq.com/tools/markup-margin-calculator): Flip between markup and margin and price work to a target profit. - [Labor & Crew Cost Estimator](https://www.nordixhq.com/tools/labor-cost-calculator): Burdened crew cost per hour and per day from wages, burden, and crew mix. - [Equipment Fuel Cost Calculator](https://www.nordixhq.com/tools/equipment-fuel-calculator): Daily and project fuel burn and cost by machine and run hours. - [Market Data](https://www.nordixhq.com/tools/market-data): Live-ish prices and trends for the materials you buy. - [Construction Material Price Tracker](https://www.nordixhq.com/tools/material-prices): Copper, aluminum, steel & diesel prices with a simple outlook — translated into real trade-unit costs. - [Lumber & Panel Price Tracker](https://www.nordixhq.com/tools/lumber-price-tracker): Framing lumber, sheathing, and plywood/OSB price trends for budgeting and bid timing. - [Regional Cost Index](https://www.nordixhq.com/tools/regional-cost-index): Compare material and labor cost levels across metro areas to localize an estimate. ## Reference Charts (56 live) - [All reference charts](https://www.nordixhq.com/reference) - [Electrical](https://www.nordixhq.com/reference/electrical): Conductor, conduit, and grounding look-up charts for sizing and code checks. - [Wire Ampacity Chart](https://www.nordixhq.com/reference/wire-ampacity-chart): Copper and aluminum conductor ampacities at 60°C, 75°C, and 90°C, from 14 AWG to 1000 kcmil. (NEC 310.16) - [Ampacity Correction & Adjustment Factors](https://www.nordixhq.com/reference/ampacity-correction-factors): Ambient-temperature correction and conductor-bundling adjustment multipliers. (NEC 310.15(B)(1) & 310.15(C)(1)) - [Wire Dimensions Chart](https://www.nordixhq.com/reference/wire-dimensions-chart): Approximate diameter and cross-sectional area by insulation type (THHN, XHHW, THW, RHW) and size. (NEC Chapter 9, Table 5) - [Wire Resistance Chart](https://www.nordixhq.com/reference/wire-resistance-chart): DC resistance, stranding, and bare-conductor properties by AWG and kcmil size. (NEC Chapter 9, Table 8) - [Conduit Size & Fill Chart](https://www.nordixhq.com/reference/conduit-fill-chart): Usable wire-fill area by trade size for EMT, IMC, RMC, and PVC Schedule 40/80 conduit. (NEC Chapter 9, Tables 1 & 4) - [Conduit Bodies Chart](https://www.nordixhq.com/reference/conduit-bodies-chart): Every conduit body letter decoded — C, E, LB, LL, LR, T, TB, X — with the Form 5/7/8 profiles and the splice rules. (NEC 314.16(C)) - [Cable Tray Fill Chart](https://www.nordixhq.com/reference/cable-tray-fill-chart): Allowable cable fill area by tray width for ladder, ventilated-trough, and solid-bottom trays, plus single-conductor rules. (NEC 392.22) - [Ground Wire Size Chart](https://www.nordixhq.com/reference/ground-wire-size-chart): Minimum copper and aluminum equipment grounding conductor size for each breaker or fuse rating. (NEC 250.122) - [Grounding Electrode Conductor Chart](https://www.nordixhq.com/reference/grounding-electrode-conductor-chart): GEC sizing from the service-entrance conductor size, with the per-electrode caps. (NEC 250.66) - [Bonding Jumper Size Chart](https://www.nordixhq.com/reference/bonding-jumper-size-chart): Grounded conductor, main, system, and supply-side bonding jumper sizes from the service conductors. (NEC 250.102(C)(1)) - [Cable Tray Grounding Chart](https://www.nordixhq.com/reference/cable-tray-grounding-chart): Minimum tray metal cross-section for a cable tray to serve as the equipment grounding conductor, by OCPD rating. (NEC 392.60(A)) - [Motor Full-Load Current Chart](https://www.nordixhq.com/reference/motor-fla-chart): Full-load amps by horsepower and voltage for single- and three-phase motors. (NEC 430.248 & 430.250) - [Transformer Overcurrent Protection Chart](https://www.nordixhq.com/reference/transformer-protection-chart): Maximum primary and secondary OCPD percentages for transformers 1000 V and less. (NEC 450.3(B)) - [MV Transformer Protection Chart](https://www.nordixhq.com/reference/mv-transformer-protection-chart): Maximum OCPD percentages for transformers over 1000 V, by supervision, impedance, and device type. (NEC 450.3(A)) - [NEMA Starter Size Chart](https://www.nordixhq.com/reference/nema-starter-size-chart): NEMA starter sizes 00 through 9 with continuous ampere ratings and maximum horsepower per voltage, single- and three-phase. (NEMA ICS 2) - [Motor Circuit Protection Chart](https://www.nordixhq.com/reference/motor-circuit-protection-chart): Maximum fuse and breaker sizes as a percentage of motor full-load current per NEC Table 430.52, plus the 430.32 overload percentages. (NEC 430.52 / 430.32) - [Motor Circuit Data Chart](https://www.nordixhq.com/reference/motor-circuit-data-chart): One row per motor: full-load current, minimum wire size, maximum fuse and breaker, NEMA starter size, and disconnect size, derived per NEC 430. (NEC 430 / NEMA ICS 2) - [IEC vs NEMA Starter Chart](https://www.nordixhq.com/reference/iec-nema-starter-chart): IEC utilization categories AC-1 through AC-4 with their make/break duties, plus the NEMA vs IEC selection trade-offs and coordination types. (IEC 60947-4-1) - [Safety Switch Ratings Chart](https://www.nordixhq.com/reference/safety-switch-ratings-chart): Disconnect safety switch sizes 30 through 1200 amperes with horsepower ratings by voltage, and the general-duty vs heavy-duty comparison. (UL 98) - [Motor Disconnect Rules Chart](https://www.nordixhq.com/reference/motor-disconnect-rules-chart): NEC disconnect rules for motors and HVAC equipment: the 115% sizing rule, the seven permitted device types, and the within-sight requirements with their exceptions. (NEC 430.102–110 / 440) - [Fuse Class Chart](https://www.nordixhq.com/reference/fuse-class-chart): Low-voltage fuse classes H through L: voltage and ampere ranges, interrupting ratings, rejection features, and where each class belongs. (UL 248) - [NEMA Enclosure Ratings Chart](https://www.nordixhq.com/reference/nema-enclosure-types-chart): What each NEMA enclosure type protects against, indoor and outdoor, with approximate IP equivalents and the IP digit decoder. (NEC 110.28 & NEMA 250) - [NEMA Plug & Receptacle Chart](https://www.nordixhq.com/reference/nema-plug-receptacle-chart): Face diagrams and specs for every straight-blade and twist-locking configuration: voltage, poles, wires, and grounding. (NEMA WD-6) - [Hazardous Locations Chart](https://www.nordixhq.com/reference/hazardous-locations-chart): Class I/II/III and Division 1/2 definitions, material groups A–G, and the T1–T6 temperature codes. (NEC 500.5, 500.6 & 500.8(C)) - [Hazardous Location Wiring & Sealing Chart](https://www.nordixhq.com/reference/hazardous-location-wiring-chart): Class I Division 1/2 wiring methods, every location where a conduit seal is required, and the seal installation rules. (NEC 501.10 & 501.15) - [Plumbing](https://www.nordixhq.com/reference/plumbing): Fixture units, drainage sizing, and pipe look-up tables — IPC and UPC labeled. - [Drainage Fixture Unit (DFU) Chart](https://www.nordixhq.com/reference/dfu-chart): Drainage fixture unit values and minimum trap sizes for every plumbing fixture — IPC and UPC values kept separate and labeled. (IPC 709.1 / UPC 702.1) - [Drain Pipe Size Chart](https://www.nordixhq.com/reference/drain-pipe-size-chart): Minimum drain, stack, and building-drain size from total drainage fixture units, by slope. (IPC 710.1 / UPC 703.2) - [Building Drain & Sewer Capacity Chart](https://www.nordixhq.com/reference/building-drain-capacity-chart): Maximum DFU on the building drain and building sewer by pipe size and slope — the IPC four-slope matrix and the UPC basis-plus-multiplier. (IPC 710.1(1) / UPC 703.2) - [Vent Pipe Size Chart](https://www.nordixhq.com/reference/vent-pipe-size-chart): Maximum developed length of stack vents and vent stacks by stack size and connected DFU, with the UPC vent capacity and length limits. (IPC 906.1 / UPC 703.2) - [Drain Pipe Slope Chart](https://www.nordixhq.com/reference/pipe-slope-chart): Minimum slope of horizontal drainage piping by pipe size, with each slope expressed per foot, in percent, and as fall over common run lengths. (IPC 704.1 / UPC 708.1) - [Fixture Trap Size Chart](https://www.nordixhq.com/reference/fixture-trap-size-chart): Minimum trap and trap-arm size for every plumbing fixture, arranged by trap size, with the IPC unlisted-fixture trap-to-DFU table. (IPC 709.1 / UPC 702.1) - [Water Supply Fixture Unit (WSFU) Chart](https://www.nordixhq.com/reference/wsfu-chart): Water supply fixture unit values per fixture with the WSFU-to-GPM demand conversion. (IPC E103.3 / UPC 610) - [WSFU to GPM Conversion Chart](https://www.nordixhq.com/reference/wsfu-to-gpm-chart): The tabulated Hunter's curve: probable peak demand in GPM from total water supply fixture units, flush-tank and flushometer systems. (IPC E103.3(3)) - [Water Pipe Sizing Chart](https://www.nordixhq.com/reference/water-pipe-size-chart): Water meter and building supply/branch pipe size from total WSFU and developed length, for each pressure range, per the UPC table method. (UPC 610.4 / IPC 604.3) - [Fixture Water Demand Chart](https://www.nordixhq.com/reference/fixture-water-demand-chart): Maximum flow rates and flush volumes per fixture — the federal baseline, the IPC and UPC limits, and the WaterSense levels. (IPC 604.4 / EPAct 1992) - [Natural Gas Pipe Sizing Chart](https://www.nordixhq.com/reference/gas-pipe-sizing-chart): Schedule 40 pipe capacity in BTU/hr by developed length, per the longest-length method. (NFPA 54 / IFGC 402) - [HVAC & Mechanical](https://www.nordixhq.com/reference/hvac): Duct sizing, airflow, static pressure, and sheet-metal look-up tables. - [Duct Sizing Chart](https://www.nordixhq.com/reference/duct-sizing-chart): CFM capacity for 4" through 30" round metal duct at design friction rates from 0.05 to 0.20 in. w.g. per 100 ft, with resulting velocities. (ASHRAE Fundamentals) - [Rectangular to Round Duct Conversion Chart](https://www.nordixhq.com/reference/duct-equivalent-chart): Equivalent round diameter for every rectangular duct size — ASHRAE equal-friction equivalents, plus the reverse lookup at common depths. (ASHRAE Fundamentals) - [Duct Friction Loss Chart](https://www.nordixhq.com/reference/duct-friction-loss-chart): Friction loss in inches of water column per 100 feet for round galvanized duct, by airflow and diameter, computed at ASHRAE standard air. (Darcy-Weisbach (computed)) - [Flex Duct CFM Chart](https://www.nordixhq.com/reference/flex-duct-cfm-chart): Lab-measured capacity of fully stretched flex duct vs rigid metal, the measured compression penalty, and the ADC installation rules. (LBNL / ADC / UL 181) - [Air Velocity Chart](https://www.nordixhq.com/reference/air-velocity-chart): Recommended air velocities for main and branch ducts by building type, residential supply/return limits, and coil and louver face velocities. (ASHRAE / ACCA lineage) - [CFM Per Ton Chart](https://www.nordixhq.com/reference/cfm-per-ton-chart): The airflow conventions — 400 CFM per ton nominal, 350 humid, 450 dry — and square-feet-per-ton ranges by building type, with the caveats. (ACCA rules of thumb) - [Static Pressure Chart](https://www.nordixhq.com/reference/static-pressure-chart): Design static-pressure allowances by component — Manual D residential defaults, verified commercial drops, and total budgets by system type. (ACCA Manual D lineage) - [Sheet Metal Gauge Chart](https://www.nordixhq.com/reference/sheet-metal-gauge-chart): Gauge to decimal thickness and weight for galvanized steel, uncoated MSG steel, and aluminum sheet, 30 through 10 gauge. (MSG / ASTM A653) - [Duct Gauge Chart](https://www.nordixhq.com/reference/duct-gauge-chart): Minimum duct sheet-metal thickness by size and pressure class for round and rectangular duct, with approximate gauge equivalents. (IMC 603.4 / SMACNA) - [Duct Hanger Spacing Chart](https://www.nordixhq.com/reference/duct-hanger-spacing-chart): Support rules for metal and flexible duct — the IRC strap rule, the IMC/SMACNA commercial framework, and the flex spacing and sag limits. (IMC 603.10 / ADC) - [Fire Alarm](https://www.nordixhq.com/reference/fire-alarm): Strobe candela, detector spacing, and device-placement look-up tables for NFPA 72 layout. - [Strobe Candela Chart](https://www.nordixhq.com/reference/strobe-candela-chart): Minimum wall-mounted strobe candela rating by room size, for a single visible appliance and for the two- and four-appliance layouts. (NFPA 72 Table 18.5.5.4.1) - [Ceiling Strobe Candela Chart](https://www.nordixhq.com/reference/ceiling-strobe-candela-chart): Minimum ceiling-mounted strobe candela rating by room size and mounting height, per the NFPA 72 ceiling table. (NFPA 72 Table 18.5.5.5.1) - [Corridor Strobe Spacing Chart](https://www.nordixhq.com/reference/corridor-strobe-spacing-chart): The 15 cd corridor allowance for spaces up to 20 ft wide, with the end-of-corridor and maximum-spacing placement rules and the synchronization requirement. (NFPA 72 18.5.5.4.4) - [Audible dBA Requirements Chart](https://www.nordixhq.com/reference/audible-dba-requirements): Public, private, and sleeping-area audibility requirements above ambient sound, with the typical average ambient sound levels by occupancy. (NFPA 72 18.4) - [Smoke Detector Spacing Chart](https://www.nordixhq.com/reference/smoke-detector-spacing-chart): The nominal 30 ft smooth-ceiling spacing, the half-spacing wall rule, and the 0.7 rule for irregular layouts and high ceilings. (NFPA 72 17.7.3) - [Heat Detector Spacing Chart](https://www.nordixhq.com/reference/heat-detector-spacing-chart): The ceiling-height spacing reduction factors that shrink a heat detector’s listed spacing as the ceiling rises above 10 ft. (NFPA 72 Table 17.6.3.5.1) - [Detector Placement Rules](https://www.nordixhq.com/reference/detector-placement-rules): Where a spot detector may and may not go — the wall dead-air band, HVAC clearances, beam and joist rules, and sloped and peaked ceilings. (NFPA 72 17.7.3) - [Heat Detector Temperature Chart](https://www.nordixhq.com/reference/heat-detector-temperature-chart): The heat detector temperature classifications with their rating ranges, maximum ceiling temperatures, and the color codes marked on the device. (NFPA 72 Table 17.6.2.1) - [Device Mounting Heights Chart](https://www.nordixhq.com/reference/fire-alarm-mounting-heights): Mounting heights above finished floor for strobes, horns, combination appliances, and manual pull stations, with the ADA reach ranges. (NFPA 72 / ADA 308) - [Pull Station Placement Chart](https://www.nordixhq.com/reference/pull-station-placement-chart): Manual pull station placement — within 5 ft of each exit, the 200 ft travel-distance limit, mounting height, and per-floor requirement. (NFPA 72 17.14) ## Legal - [Terms of Service](https://www.nordixhq.com/terms) - [Privacy Policy](https://www.nordixhq.com/privacy)