A.3 Partial factors for structural (STR) and geotechnical (GEO) limit states verification

A.3.1 Partial factors on actions (γ_F) or the effects of actions (γ_E)

(1)P For the verification of structural (STR) and geotechnical (GEO) limit states set A1 or set A2 of the following partial factors on actions (γ_F) or the effects of actions (γ_E) shall be applied:

• γ_G on permanent unfavourable or favourable actions;
• γ_Q on variable unfavourable or favourable actions.

NOTE The values to be ascribed to γ_G and γ_Q for use in a country may be found in its National annex to EN 1990:2002. The recommended values for buildings in EN 1990:2002 for the two sets A1 and A2 are given in table A.3.

A.3.2 Partial factors for soil parameters (γ_M)

(1)P For the verification of structural (STR) and geotechnical (GEO) limit states set M1 or set M2 of the following partial factors on soil parameters (γ_M) shall be applied:

• γ_φ' on the tangent of the angle of shearing resistance;
• γ_c' on effective cohesion;
• γ_cu on undrained shear strength;
• γ_qu on unconfined strength;
• γ_γ on weight density.

NOTE The values to be ascribed to γ_φ', γ_c', γ_cu, γ_qu and γ_γ for use in a country may be found in its National annex to this standard. The recommended values for the two sets M1 and M2 are given in table A.4.

A.3.3 Partial resistance factors (γ_R)

A.3.3.1 Partial resistance factors for spread foundations

(1)P For spread foundations and verifications of structural (STR) and geotechnical (GEO) limit states, set R1, R2 or R3 of the following partial factors on resistance (γ_R) shall be applied:

• γ_R;v on bearing resistance;
• γ_R;h on sliding resistance.

NOTE The values to be ascribed to γ_R;v, and γ_R;h for use in a country may be found in its National annex to this standard. The recommended values for the three sets R1, R2 and R3 are given in table A.5.

A.3.3.2 Partial resistance factors for pile foundations

(1)P For pile foundations and verifications of structural (STR) and geotechnical (GEO) limit states, set R1, R2, R3 or R4 of the following partial factors on resistance (γ_R) shall be applied :

• γ_b on base resistance;
• γ_s on shaft resistance for piles in compression;
• γ_t on total/combined resistance for piles in compression;
• γ_s;t on shaft resistance for piles in tension.

NOTE The values to be ascribed to γ_b, γ_s, γ_t and γ_s;t for use in a country may be found in its National annex to this standard. The recommended values for the four sets R1, R2, R3 and R4 are given in table A.6 for driven piles, in table A.7 for bored piles and in table A.8 for continuous flight auger (CFA) piles.