The document specifies: "FIRST AC + AC TWO TIER: LFCWAC, 10+28 passengers, 42.50 tons." This composite coach provides both premium First AC accommodation (10 berths) and Two Tier AC (28 berths) in a single unit, offering operational flexibility for routes with mixed demand.

The document specifies: "AC DOUBLE DECKER AC CHAIR CAR (EOG): LWCZDAC, 120 passengers, 49.53 tons." This high-capacity coach represents a significant evolution in passenger accommodation, carrying 120 passengers versus 78 in standard AC chair cars.

The document specifies: "Non-AC LHB Hot Buffet (EOG): LWCBNAC, 15 Berths, 40.38 tons." This specific code and weight data is essential for train composition planning and load distribution calculations.

The document specifies: "Maximum CBC drop under gross load: 75 mm." This, combined with "maximum height of centre line of side CBC above rail level for empty vehicle is 1105 mm," ensures coupler compatibility between different coach types and loading conditions.

The document specifies: "Distance between centre pivots: 14900 mm." This dimension determines the coach's ability to negotiate curves and is a fundamental parameter for bogie design and track interaction calculations.

The document specifies: "Can negotiate curves of 175m radius at 40 kmph and 1 in 8½ turnouts at 30 kmph." These precise capabilities ensure operational flexibility on India's diverse rail network with varying curvature.

The document specifies: "pointed load of 850 N (85 Kgs) as per UIC 566." This is distinct from the distributed load capacity (1000 N/m) and represents the maximum force that can be applied at a single point, simulating a concentrated luggage item.

The document specifies: "Made from aluminum extrusion with tempered safety glass." This combination provides strength (aluminum extrusion), visibility (glass), and safety (tempered glass that shatters into small, less dangerous pieces if broken).

The document specifies: "Yaw damper: 2 units, 11000 N, RAL 7012 (Basalt Grey)." Yaw dampers control rotational movement of the bogie relative to coach body, and their high capacity (11000 N) reflects the significant forces involved in high-speed stability.

The document specifies: "Height from Rail level: 270 mm." This precise clearance is critical for safe operation over track infrastructure, including crossings and yard humps, while maximizing available space for the tank.

The document specifies: "Stainless steel tank with 6 partition walls inside." These internal walls create a baffled flow path, increasing retention time and improving the anaerobic digestion process by preventing short-circuiting of waste.

The document specifies: "LWLRRM (coil spring) → LWLRRMA (120 KN) → LWLRRMAA (160 KN)." This systematic coding allows immediate identification of suspension type from the coach code, essential for maintenance and operational planning.

The document specifies: "Width between arm rests: 420 mm (chair car), 500 mm (Executive class)." This 80 mm additional width in Executive class provides premium comfort and is a key differentiator between classes.

The document specifies: "Underframe uses IRSM-41 CORTEN steel" while "Roof structure, side walls, and end walls are ferritic stainless steel." This material differentiation optimizes strength (CORTEN for structural underframe) versus corrosion resistance (stainless for visible/exposed areas).

The document shows: "Length over body: 23540 mm" and "Length over CBC: 24000 mm." The difference of 460 mm (24000 - 23540) represents the coupler projection at each end (230 mm per end), which is critical for platform clearance calculations.

The document specifies: "Ride index at 160 Kmph: 2.5 (not >2.75)." The ride index is a standardized measure of comfort (Sperling's Ride Index), and maintaining it below 2.75 ensures excellent passenger comfort at maximum operating speed.

The document specifies: "Maximum axle load permissible: 16.25 tonnes." This precise limit ensures track-friendly operation while maximizing payload capacity, and is a key parameter for locomotive engineers and maintenance planners.

The document specifies: "Wheels diameter (New): 915 mm." This specific diameter, combined with the 2560 mm wheel base, determines the bogie's dynamic characteristics and curving performance.

The document cites this specific reference: "as per Railway Board letter No. 2019/CEDO/SD/IRSOD/O/ACS-27 dated 17.07.2019." This level of documentation precision is essential for regulatory compliance and dimensional assurance.

The document specifies: "SS fasteners (instead of MS) on tank covers" and "Two inbuilt C-Type mounting systems along tank length, each with two M16 bolts." The stainless steel fasteners prevent corrosion in the aggressive toilet environment, while the M16 bolts provide robust mounting.

The document specifies: "Total Volume: 410 litres, Working Volume: 332 litres." The 78-litre difference (approximately 19% of total volume) provides necessary headspace for gas collection and prevents overfilling.

The document provides precise dimensions: "Length: 1040 mm, Width: 766 mm, Height: 515 mm." These specific dimensions, along with the 270 mm height from rail level, ensure the tank fits within the restricted underframe space while maintaining required clearances.

The document specifies: "Empty Tank Weight: 120 kg" and "Full Tank Weight: 425 kg." The difference of 305 kg represents the waste and water capacity, which at 332 litres working volume indicates the density of the waste-water mixture.

The document states: "The body-bogie connection can cater for acceleration up to 0.5g in lateral and longitudinal direction. Beyond that value, a bracket comes into action between bogie bolster and coach body as a safety measure." This 0.5g threshold is a critical design parameter for emergency scenarios.

The document specifies a complex distribution: "One bearing on each bogie is fitted with current return device. One bearing on each axle is fitted with sensors for detecting speed, and the remaining one bearing is without any attachment on each bogie." This 4-bearing bogie thus has bearings with three different specifications.

The document specifies: "Secondary Vertical (Non-AC): 2 units, 4050 N, RAL 3011" and "Secondary Vertical (AC): 2 units, 3500 N, RAL 6027." The 550 N difference reflects the different mass and loading characteristics of AC versus Non-AC coaches.

The document shows Primary Vertical dampers are "RAL 7012 (Basalt Grey)" and notes that "Secondary Lateral (coil bogie)" also uses "RAL 7012 (Basalt Grey)." However, Secondary Lateral dampers with Air springs use RAL 9005 (Black), showing color coding depends on both function and suspension type.

The document specifies: "Minimum strength: 52 kg/mm² with D class weld." This precise strength requirement ensures the Y-shaped longitudinal beams and tubular steel members can withstand the dynamic loads encountered at speeds up to 160 kmph.

The document states: "Earlier Version: 5 alarms per coach (2 in passenger compartment, 3 in lavatories)." This distribution reflected the historical approach where lavatories were considered high-priority emergency locations due to passenger isolation.

The document specifies: "Fluorescent tubes: 18 watts (general lighting), Incandescent lamps: 10 watts (night lamp and pantry), Halogen lamps: 10 watts (reading lights)." This differentiated wattage strategy optimizes energy use for different functional requirements.

The document states: "Fluorescent tubes of 18 watts are used for general lighting, vestibule, toilet, pantry, and emergency working at 110 Volts AC/DC with inverter and polycarbonate diffusers." The AC/DC compatibility and inverter system ensure operation during power source transitions.

The document specifies: "sleeplessly inclinable backrest (17° upright, 37° rest)." This 20-degree range of continuous adjustment (sleeplessly inclinable means infinitely variable, not stepped) provides superior passenger comfort compared to conventional stepped-recline mechanisms.

The document explicitly states: "Weight: approximately 21 kg (vs 28 kg in conventional coaches)." This 7 kg per seat reduction (approximately 25% lighter) significantly contributes to the overall pay-to-tare ratio improvement of LHB coaches.

The document specifies: "16 mm composite board made from cork panels glued to 'MakeOre' wood." This specific combination provides the unique properties of being lightweight, strong, warp resistant, and resistant to vibration/impact forces while incorporating fire resistance treatment.

The document specifies: "It can withstand distributed load of 1000 N (100 kgs) per meter length and pointed load of 850 N (85 Kgs) as per UIC 566." The distinction between distributed and pointed loads is crucial for design verification and testing protocols.

The document details: "The sealed unit consists of outer 8.4mm laminated glass and inner 4mm tempered safety glass with 6mm air gap with Krypton/Argon gas filling." The specific gas filling improves thermal insulation while the asymmetrical glass construction balances safety and security requirements.

The document specifies "Noise level inside coach limited to 60 DB" achieved through multiple interventions: "Resonaflex insulating mats," "De-coupling elements in flooring," and "Elastomeric rubber-metal components in bogie." This multi-layered approach addresses noise at different sources and transmission paths.

The document states: "PU based spray insulation for corrosion and sound protection on interior surfaces." This dual-function application is a sophisticated feature that simultaneously addresses two critical requirements - protecting the steel structure from corrosion while also providing acoustic damping.

The document specifies a differentiated insulation approach: "Resonaflex insulating mats for floor, side walls lower area, and end walls" and "Resonaflex-Alu & Baryskin V60DB in shell." This specialized combination optimizes both heat and sound insulation throughout different coach areas.

The document explicitly states that LHB coaches feature "Economical weight steel construction with interlocking technique (Alstom design)." This proprietary technique allows for lightweight yet strong construction without excessive welding, contributing to the overall weight reduction of approximately 10% compared to conventional coaches.