design-code-lookup

name	design-code-lookup
description	Engineering code and standard lookup — AISC, ASME BPVC, AWS D1.1, ASCE 7, ASTM, API, ISO, NFPA. Key clauses, section numbers, and their design provisions.
metadata	{"priority":6,"promptSignals":{"phrases":["design code","AISC","ASME","AWS D1.1","ASCE 7","API","code requirement","standard provision","code check"],"minScore":3}}

Design Code Lookup — Complete Skill

AISC 360 (Steel Construction — LRFD/ASD)

Chapters:

• B: General Provisions (material, member limits)
• C: Stability (direct analysis method)
• D: Tension members (Whitmore section, block shear)
• E: Compression members (slenderness, buckling)
• F: Beams (yielding, LTB, flange local buckling)
• G: Shear (web yielding, buckling, transverse stiffeners)
• H: Combined forces (beam-column, H1-1a/H1-1b)
• I: Composite construction (steel-concrete)
• J: Connections (bolts, welds, bearing, tearout, block shear)
• K: HSS connections
• L: Serviceability (deflections, vibration)

Key equations: F.2-1: M_n = M_p = F_y × Z (yielding, compact section) F.2-2: M_n = C_b[M_p - (M_p-0.7F_yS_x)(L_b-L_p)/(L_r-L_p)] (inelastic LTB) E3-1: F_cr = 0.658^(F_y/F_e) × F_y where F_e = π²E/(KL/r)²

ASME BPVC (Boiler & Pressure Vessel Code)

Sections:

• Section I: Power Boilers
• Section II: Materials (Parts A-D)
  • Part D: Allowable stresses, physical properties
• Section III: Nuclear Vessels
• Section IV: Heating Boilers
• Section VIII: Unfired Pressure Vessels
  • Division 1: UG-27 shell thickness, UG-32 heads
  • Division 2: Alternative rules (higher allowable, design by analysis)
  • Division 3: Ultra-high pressure (>10,000 psi)
• Section IX: Welding Qualifications (WPS, PQR, WPQ)
• Section X: Fiber-Reinforced Plastic Vessels

Key clauses VIII Div. 1: UG-27: Cylindrical shell t = PR/(SE - 0.6P) UG-32: Ellipsoidal head t = PD/(2SE - 0.2P) UG-37: Nozzle reinforcement area UW-12: Weld joint efficiency E (1.0/0.85/0.70 for RT class 1/2/none)

AWS D1.1 (Structural Welding — Steel)

Clauses:

• Clause 3: Design (prequalified joints, weld size)
• Clause 4: Fabrication (weld sequence, distortion)
• Clause 5: Qualification (WPS, welder)
• Clause 6: Inspection (VT, MT, PT, RT, UT requirements)

Prequalified joints (Table 4.12): B-U2 (CJP butt), B-L1 (PJP butt), C-U4 (T-joint CJP) Weld quality (Clause 6.9): Undercut: ≤ 1/32" (≤ 0.8mm) for cyclically loaded; ≤ 1/16" static Porosity: ≤ 3/8" aggregate in 12" for cyclic Cracks: not acceptable

Fillet weld minimum size: Table J2-4 (same as AISC J2-5) Electrode matching: Table 3.1 (matching filler for base metal)

ASCE 7 (Minimum Design Loads)

Chapters:

• Ch 2: Load combinations (LRFD: 1.2D+1.6L; 1.2D+1.6S+0.5L)
• Ch 6: Flood loads
• Ch 7: Snow loads (C_s, C_e, I_s factors; ASCE 7-22 uses C_t)
• Ch 10: Wind loads (Exposure categories A-D, C_p coefficients)
• Ch 11-22: Seismic (S_DS, S_D1, R, I_e, drift limits)

Wind load procedure: V (design wind speed, mph) → q_z = 0.00256 K_z K_zt K_d V² MWFRS: p = q_z × G × C_p - q_i × G_i × C_pi C_p from Fig. 27.3 (walls/roofs)

Seismic load: S_DS, S_D1 from USGS hazard maps V = C_s × W; C_s = S_DS/(R/I_e) ≥ 0.01 Check story drift < 0.010h_sx (SDC D/E/F)

API Standards (Petroleum/Pipeline)

API 5L: Pipe for pipelines (Gr. A/B/X42/X52/X60/X65/X70/X80) API 579-1/ASME FFS-1: Fitness-for-Service (flaw assessment, remaining life) API 610: Centrifugal pumps (OH1/OH2/OH3/BB1-BB5/VS types) API 650: Atmospheric storage tanks (cone roof, floating roof, internal) API 670: Machinery protection — vibration monitoring (proximity probes) API 676: Rotary gear pumps API 1104: Welding of pipelines (girth welds, repair) API RP 2A: Fixed offshore platforms (load factors, tubular joints)

ISO Standards (International)

ISO 1940-1: Rotor balancing grades (G0.4 to G100) ISO 286-1: Limits and fits (H7/g6 system, tolerance tables) ISO 6507: Vickers hardness test ISO 9001: Quality management systems ISO 23277: NDT for welds (PT) ISO 17640: UT of welds ISO 4063: Welding process numbers (111=SMAW, 135=GMAW, 141=GTAW)

NFPA (Fire Protection)

NFPA 13: Sprinkler systems (hazard classifications, density/area curves) NFPA 70: National Electrical Code (motor protection, wiring) NFPA 30: Flammable/combustible liquids (tank spacing, venting) NFPA 704: Hazard diamond (health/fire/instability/special)

ASTM (Materials Testing)

ASTM A36: Structural steel (F_y = 36 ksi, F_u = 58 ksi) ASTM A572 Gr 50: High-strength low-alloy (F_y = 50 ksi, F_u = 65 ksi) ASTM A992: W-shapes (F_y = 50 ksi, F_u = 65 ksi, web/flange ratio limits) ASTM A325/A490: High-strength bolts (F_u = 120/150 ksi) [now ASTM F3125] ASTM E8: Tension testing of metals ASTM E23: Charpy impact test ASTM E1820: Fracture toughness K_IC testing

Code Interaction Matrix

Component	Primary Code	Secondary
Pressure vessel	ASME VIII	ASME II, IX
Structural steel	AISC 360	ASCE 7, AWS D1.1
Pipeline	ASME B31.3/B31.8	API 5L, API 1104
Rotating equipment	API 610/670	ISO 1940
Seismic	ASCE 7	IBC, AISC 341 (seismic)
Crane	ASME B30	AISC, AWS D1.1

Output

Provide: applicable code section number, clause reference, key formula with variable definitions, allowable limits, and inspection/testing requirements.