Author: hirocherry7312

Thermal Expansion Length

Calculate the value of thermal expansion: [725,SI] THEMA-EXPANSION=LENGTH ΔL = α × (T2 - T1) × L

Tensile Fracture Due to Steel Thermal Expansion--STEEL-THEMAL-EXP

When steel is restrained (fixed), thermal expansion causes stress, requiring a restraining force; if the stress exceeds the allowable tensile strength (N/mm²), the steel will fracture. [325,725] STEEL-THERMAL-EXPANSION-FRACTURE=STRESS σ = α × (T2 - T1) × E

Carbon equivalent of steel--STEEL-CARBON-EQUIVALE

It serves as an indicator of the hardenability of steel during welding.

Maximum hardness and carbon equivalent - CARBON-EQUIVALENT=MA

The maximum hardness near the weld joint of steel exhibits a linear relationship with the carbon equivalent of the steel: [110,325] CARBON-EQUIVALENT = MAXIMUM-HARDNESS Hvmax = 1,200 × Ceq – 200 --- For fillet welds on 12 mm thick plates

Weld Cracking Susceptibility Index -- WELD-CRACKING-PARAM

The weld cracking susceptibility (Pcm) depends on the chemical composition of the steel.

Hot-Dip Galvanizing and Diaphragm Open Area Ratio -- HOT-DIP-GAL

The diaphragm for hot-dip galvanized column posts requires holes and notches in the center and at the four corners so that it can be immersed in the galvanizing bath [110,325] HOT-DIP-GALVANIZING-HOLE=RATIO Da = 2.7 × A + 1.9 × B - 202 -------- JISH 9124 (Hot-Dip Galvanizing Work Guidelines and Explanations) A:B = 1:1

Weldable Plate Thickness Range - PLATES-WELDABLE-THICK

Butt welding (excluding T-joints) is permissible when the difference in the thickness of base metal b does not exceed 5 mm.

Friction Coefficient of Hot-Dip Galvanized Fittings -- FRICTIONAL-CO

Confirmation of the slip coefficient test specimen and friction coefficient (0.4 or higher) for hot-dip galvanized fittings Yield strength of the components (SS400 = 235 N/mm² or SM490 = 325 N/mm²), two-surface joint of the hot-dip galvanized surfaces Calculate μ = P / (m × n × N). Note: If the plate width is inappropriate, the member must not yield and become thinner before slippage occurs [110,325] ZINC HOT-DIP-GALVANIZING-FRICTIONAL-COEFFICIENT=RATIO μx = (W - (Φ + 3)) × T1 × σy / (m × n × N)

Carbon equivalent of rebar -- REBARL-CARBON-EQUIVAL

It serves as an indicator of the hardenability of rebar resulting from welding or pressure bonding.

Welding Wire and Heat Input - WELDING-WIRE=HEAT-I

When welding column-beam joints, it is necessary to control the heat input and the temperature between passes.

Stud Welding and Power Supply Voltage and Capacity - STUD-WELDING-TR

Stud Welding and Power Supply Transformer Capacity--STUD-WELDING-TRANSFORMER=CAPACITY Ps = A × V × √Φ / √ξ Determine the minimum power supply capacity required for a DC welder based on its general specifications and efficiency ξ

Jack and Ram Contact Surface Pressure - JACK-CONTACTED-SUR

Jack and Ram Contact Surface Pressure - JACK-CONTACTED-SURFACE=PRESSURE [321,326] Ps = TJ/A Determine the allowable value of the spacer contact surface pressure (kg/cm²) for a given load (kg).

Bolt Hole Diameter vs. Nominal Thread Size--BOLT-HOLE-VS-HIG

The relationship between the bolt hole diameter and the nominal diameter of high-tension bolts is specified in the S Standard: [325, S Standard] BOLT-HOLE-VS-HIGH-TENSION-BOLT-NOMINAL-DIAMETER Δs = Φ – d1 = 2 (when d1 < 27), 3 (when d1 ≥ 27)

Staggered Gauge and Pitch -- BOLT-STAGGING-GU

The S Standard defines the relationship between the gauge (g) and pitch (p) for staggered bolt spacing as shown in the sketch: [325, S Standard] BOLT-STAGGING-GAUGE-PITCH = INTERVAL b = (p² - g²)⁰.⁵

Minimum edge distance--BOLT-EDGE-DISTANCE=NOI

The minimum edge distances (D1: shear drilling; D2: drill hole drilling) are specified in the S Standard.

Correction Factors for Steel Tape Measures and Temperature - MEASURING-RELAIABL

Correction Factors for Steel Tape Measures and Temperature [325,725] MEASURING-RELAIABLE-LENGTH=TEMPERATURE dx = 0.000012 × (T - T0) × L

Correction Factors for Steel Tape Measures and Tension - MEASURING-RELAIABL

Correction Factors for Steel Tape Measures and Tension [325,725] MEASURING-RELAIABLE-LENGTH=TENSION-FORCE dx = (P - P0) × L / (A × E)

Naohori Self-Supporting Retaining Wall -- SELFEARTH-RETAINING=Hc

Formula for calculating the self-supporting height by Rankine-Lehár: P = (γH + Q) × tan²(45° - φ/2) - 2Ctan(45° - φ/2) Let P represent the lateral earth pressure. Since the self-supporting height of the ground reaches equilibrium when P = 0, it can be calculated using the following modified equation:

Calculation of Orifice Tube Diameter -- ORIFICE TUBE = I.D.

Calculation of Orifice Sizes (For Retention Basins and Storage Pipes in Stormwater Control Facilities, etc.) We calculate the orifice pipe diameters to regulate water levels in underground storage tanks and similar structures.

Rainwater orifice tube diameter -- ORIFICE TUBE=I.D.

Calculation of Orifice Sizes (For Retention Basins and Storage Pipes in Stormwater Control Facilities, etc.) We calculate the orifice pipe diameters to regulate water levels in underground storage tanks and similar structures.