ASCE 7 and Eurocode both turn service loads into factored design loads, but they use different factors and notation to get there. ASCE 7 LRFD uses 1.2 times dead plus 1.6 times live; Eurocode EN 1990 uses 1.35 times permanent plus 1.5 times the leading variable, with combination factors on the rest. For the same loads they produce similar member sizes. StructLoads applies either set, and this page lines them up side by side.
Same goal, different bookkeeping
Both codes are expressions of limit state design: factor the demand up, factor the resistance down, and confirm the first stays below the second. The difference is only in the numbers and the way accompanying loads are handled. So an engineer moving between the two is not learning a new idea, just a new notation and a new set of factors. That equivalence has been measured: Bruce Ellingwood’s comparison of code load requirements in the AISC Engineering Journal found that members designed to the North American and Western European standards land in the same reliability band, roughly 2.5 to 3.0 on a 50-year basis for gravity cases, despite the different loads, strengths and partial factors.
The gravity combinations side by side
For a floor with dead, live and roof or snow loads, the main strength combinations compare like this.
| Aspect | ASCE 7 (LRFD) | Eurocode (EN 1990) |
|---|---|---|
| Dead factor | 1.2 (1.4 alone) | 1.35 permanent |
| Live factor | 1.6 | 1.5 leading variable |
| Accompanying variable | 0.5 on roof or snow | 1.5 times psi-zero |
| Main gravity case | 1.2 D + 1.6 L + 0.5 Lr | 1.35 G + 1.5 Q + 1.5 psi-zero S |
| Source | ASCE 7 | EN 1990, plus national annex |
The full ASCE set is in ASCE 7 load combinations and the full Eurocode set, including the 6.10a and 6.10b pair, is in Eurocode load combinations.
A worked comparison
Take a column carrying 519 kN dead, 270 kN live and 30 kN roof or snow. Under ASCE 7 the governing value is 1.2 times 519 plus 1.6 times 270 plus 0.5 times 30, which is 1070 kN. Under Eurocode 6.10, with psi-zero of 0.5 on snow, it is 1.35 times 519 plus 1.5 times 270 plus 1.5 times 0.5 times 30, which is about 1129 kN. The two land within about 5 percent of each other, which is typical for ordinary gravity members.
Which is heavier depends on the load mix
Because Eurocode factors dead higher (1.35 against 1.2) and ASCE 7 factors live higher (1.6 against 1.5), neither code is uniformly more onerous. A dead-dominated member, such as a heavily loaded transfer girder, can be heavier under Eurocode, while a live-dominated member can be heavier under ASCE 7. The split between the two is the same dead and live split described in dead load vs live load.
Do not mix the two
The one firm rule is to stay within one code. Each code pairs its load combinations with its own material resistance rules, and the two are calibrated together. Mixing an ASCE load with a Eurocode resistance, or the reverse, breaks that calibration. Choose the code that governs the project, often by country, and apply its loads, combinations and resistances as a set, the same discipline as choosing between LRFD and ASD within ASCE 7.
Key takeaways: Eurocode vs ASCE 7
Both factor loads to similar safety: ASCE 7 with 1.2 dead and 1.6 live, Eurocode with 1.35 permanent and 1.5 variable plus psi factors. Results land within a few percent for ordinary members, with the heavier code depending on the dead to live mix. Apply one code throughout, never a mix. StructLoads computes either set, as a preliminary figure a qualified engineer confirms against the governing code.
Quick answers
What is the difference between Eurocode and ASCE 7 load combinations?
ASCE 7 LRFD factors loads as 1.2 times dead plus 1.6 times live plus 0.5 times roof. Eurocode EN 1990 factors them as 1.35 times permanent plus 1.5 times the leading variable plus 1.5 times psi-zero times each accompanying variable. The dead and live factors differ, and Eurocode uses combination factors on accompanying actions, but both reach similar safety.
Are ASCE 7 and Eurocode results similar?
Yes, broadly. For a typical gravity column the factored reactions land within a small percentage of each other, because both codes are calibrated to similar reliability. They are not identical, since the load factors, combination factors and live load values differ, but neither is systematically much heavier for ordinary buildings.
Which load factor is higher, ASCE 7 or Eurocode?
On dead load Eurocode is higher, 1.35 against 1.2. On live load ASCE 7 is higher, 1.6 against 1.5. So which gives the larger factored load depends on the dead to live ratio of the member. A dead-dominated member can be heavier under Eurocode; a live-dominated one heavier under ASCE 7.
Can you mix ASCE 7 and Eurocode in one design?
No. You design to one code system consistently, using its loads, combinations, material standards and resistance rules together, because they are calibrated as a set. Mixing an ASCE load combination with a Eurocode resistance breaks that calibration. Pick the code that governs the project and apply it throughout.