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Uls Load Combinations

Computes all five ULS load combinations from AS/NZS 1170.0 Table 4.1 for a structural element subject to permanent, imposed, wind, and earthquake actions. Applies the appropriate combination factors (psi_c and psi_E) based on the imposed action category, then identifies the governing design action for strength design.

inputs

5 fields

context

6 archetypes

engine

with-tool

outputs

6 scored fields

contract fields

Parameter Map

5 inputs to 6 scored outputs

  • dead_load_kn

    float

    Permanent (dead) load G

    5 to 2000kN

  • live_load_kn

    float

    Imposed (live) load Q

    2 to 1500kN

  • wind_ultimate_kn

    floatoptional

    Ultimate wind action W_u

    0 to 500kN

  • earthquake_load_kn

    floatoptional

    Earthquake action E

    0 to 500kN

  • load_category

    enumoptionalhidden in hard

    Imposed action category per AS/NZS 1170.0 (A-D general, E storage)

    ABCDE
uls_permanent_kntol 0.03

ULS combination 1: 1.35 * G (kN)

uls_imposed_kntol 0.03

ULS combination 2: 1.2 * G + 1.5 * Q (kN)

uls_wind_kntol 0.03

ULS combination 3: 1.2 * G + psi_c * Q + W_u (kN)

uls_wind_uplift_kntol 0.03

ULS combination 4: 0.9 * G + W_u (kN)

uls_earthquake_kntol 0.03

ULS combination 5: G + psi_E * Q + E (kN)

governing_uls_kntol 0.03

Governing ULS design action Ed = max of all combinations (kN)

visibility contract

Difficulty Ladder

all_giveneasy

All parameters given, residential or office with category A, low wind and earthquake

all fields visible
all_givenmedium

All parameters given, wider building types including storage (category E) and high wind

all fields visible
partialhard

Load category hidden — agent must determine from building occupancy type described in archetype

load_category

scenario bands

Archetype Atlas

residential_floor

2 contexts

Residential floor beam subject to gravity and moderate wind loads

dead_load_kn20 to 80
live_load_kn10 to 40
wind_ultimate_kn5 to 30
earthquake_load_kn0 to 15

suburban-house-floor-beam / townhouse-first-floor-joist

office_beam

2 contexts

Office building floor beam (occupancy category B per AS/NZS 1170.0) with moderate imposed and wind actions

dead_load_kn50 to 200
live_load_kn30 to 120
wind_ultimate_kn10 to 80
earthquake_load_kn5 to 50

city-office-floor-beam / campus-administration-building

retail_floor

2 contexts

Retail or assembly area floor (occupancy category C per AS/NZS 1170.0) with higher imposed loads

dead_load_kn60 to 250
live_load_kn50 to 200
wind_ultimate_kn10 to 60
earthquake_load_kn5 to 60

shopping-centre-floor-slab / community-hall-floor

storage_facility

2 contexts

Warehouse or storage facility (occupancy category E per AS/NZS 1170.0) with high imposed loads

dead_load_kn80 to 400
live_load_kn100 to 600
wind_ultimate_kn20 to 120
earthquake_load_kn10 to 80

industrial-warehouse-floor / distribution-centre-rack-area

high_wind_coastal

2 contexts

Coastal commercial structure column (occupancy category B per AS/NZS 1170.0) subject to high ultimate wind actions

dead_load_kn100 to 500
live_load_kn30 to 150
wind_ultimate_kn80 to 300
earthquake_load_kn0 to 30

north-qld-cyclonic-portal-frame / darwin-commercial-building-column

seismic_zone_column

2 contexts

Column in a moderate-to-high seismic zone office building (occupancy category B per AS/NZS 1170.0) with significant earthquake action

dead_load_kn200 to 800
live_load_kn80 to 300
wind_ultimate_kn20 to 100
earthquake_load_kn50 to 250

newcastle-commercial-column / christchurch-office-frame

rendered task

Generation Preview

city-office-floor-beam-office-beam-preview

difficulty
hard
visibility
partial
archetype
office_beam
site context
city-office-floor-beam
instruction excerptuls-load-combinations_calc.py

visible fields

  • dead_load_kn50 to 200 kN
  • live_load_kn30 to 120 kN
  • wind_ultimate_kn10 to 80 kN
  • earthquake_load_kn5 to 50 kN

withheld schema

load_categoryuls_permanent_knuls_imposed_knuls_wind_knuls_wind_uplift_knuls_earthquake_kngoverning_uls_kn
Office building floor beam (occupancy category B per AS/NZS 1170.0) with moderate imposed and wind actions. city-office-floor-beam. Required outputs: uls_permanent_kn, uls_imposed_kn, uls_wind_kn, uls_wind_uplift_kn, uls_earthquake_kn, governing_uls_kn