ASCE 7-10 Load Combination Computations - A Beginner's Guide to [PDF]

ASCE 7-10 Load Combination Computations This spreadsheet will compute the load combination for up to seven load sources. Each line in the combination table represents on loading combination. (See A Beginners Guide to ASCE 7-10 for equation definitions.) Do NOT mix values from different lines when creating your beam loading diagrams. No No

Live Load < 100 psf and not a garage or place of public assembly Are flood loads included? Yes Is the structure in a V-Zone or Coastal-A zone? LRFD Load Factor for H (See ASCE 7-10 2.3.2): ASD Load Factor for H (See ASCE 7-10 2.4.1):

Loads Dead Live Roof Live Soil Loads Snow Rain Flood Atmospheric Ice Wind Wind on Ice Earthquake LRFD max value min value

ASD

Identifier Units D L Lr H S R Fa Di W Wi E

LRFD-LC1 LRFD-LC2a LRFD-LC2b LRFD-LC2c LRFD-LC2i LRFD-LC3a LRFD-LC3b LRFD-LC3c LRFD-LC3d LRFD-LC3e LRFD-LC3f LRFD-LC3g LRFD-LC3h LRFD-LC3i LRFD-LC4a LRFD-LC4b LRFD-LC4c LRFD-LC4d LRFD-LC4e LRFD-LC4f LRFD-LC4ice1 LRFD-LC4ice2 LRFD-LC5a LRFD-LC5b LRFD-LC6a LRFD-LC6b LRFD-LC6i1 LRFD-LC6i2 LRFD-LC7a LRFD-LC7b max value min value ASD-LC1 ASD-LC2 ASD-LC2i ASD-LC3a ASD-LC3b ASD-LC3c ASD-LC3i ASD-LC4a ASD-LC4b ASD-LC4c ASD-LC5a ASD-LC5b ASD-LC5c ASD-LC5d ASD-LC6a1 ASD-LC6a2 ASD-LC6a3 ASD-LC6a4 ASD-LC6a5 ASD-LC6a6 ASD-LC6b1 ASD-LC6b2 ASD-LC7a ASD-LC7b ASD-LC7i1 ASD-LC7i2 ASD-LC8a ASD-LC8b

Example 2.3

Source 1 klf 1.15 1.85 0 0 0 0 0 0 0 0 0 1.9 0.765 1.61 4.34 4.34 4.34 4.34 3.23 1.38 1.38 3.23 1.38 1.38 3.23 1.38 1.38 3.23 3.23 3.23 3.23 3.23 3.23 3.23 3.23 3.23 3.23 1.035 1.035 1.035 1.035 1.035 1.035 1.4 0.51 1.15 3 3 1.15 1.15 1.15 1.15 2.5375 2.5375 2.5375 1.15 1.15 1.15 1.15 2.5375 2.5375 2.5375 2.5375 2.5375 2.5375 2.5375 2.5375 0.69 0.69 0.69 0.69 0.69 0.69

Source 2 klf 8 0 4.8 0 20 0 0 0 0 0 0 11.2 7.2 11.2 12 19.6 9.6 9.6 17.28 17.28 17.28 41.6 41.6 41.6 9.6 9.6 9.6 12 12 19.6 19.6 9.6 9.6 19.6 19.6 13.6 13.6 7.2 7.2 7.2 7.2 7.2 7.2 8.85 4.8 8 8 8 12.8 28 8 28 11.6 23 8 8 8 8 8 11.6 11.6 23 23 8 8 26.6 26.6 4.8 4.8 4.8 4.8 4.8 4.8

Source 3 klf 0 0 0 0 0 0 0 0 15 0 25 0.35 -0.35 0 0 0 0 0 0 7.5 -7.5 0 7.5 -7.5 0 7.5 -7.5 15 -15 15 -15 15 -15 0 0 25 -25 15 -15 0 0 25 -25 0.25 -0.25 0 0 0 0 0 0 0 0 0 0 15 -15 17.5 17.5 6.75 -6.75 6.75 -6.75 6.75 -6.75 13.125 -13.125 9 -9 0 0 17.5 -17.5

0.9 0.6 Source 4 k 0 0 0 0 0 0 0 0 0 0 0 45.2 10.8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Source 5

Source 6

Source 7

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

A Beginners Guide to ASCE 7-10

-10 for equation definitions.)

Load Combination Coefficients

LRFD

ASD

D

L

Lr

H

S

R

Fa

Di

W

Wi

E

LRFD-LC1 LRFD-LC2a LRFD-LC2b LRFD-LC2c LRFD-LC2i LRFD-LC3a LRFD-LC3b LRFD-LC3c LRFD-LC3d LRFD-LC3e LRFD-LC3f LRFD-LC3g LRFD-LC3h LRFD-LC3i LRFD-LC4a LRFD-LC4b LRFD-LC4c LRFD-LC4d LRFD-LC4e LRFD-LC4f LRFD-LC4ice1 LRFD-LC4ice2 LRFD-LC5a LRFD-LC5b LRFD-LC6a LRFD-LC6b LRFD-LC6i1 LRFD-LC6i2 LRFD-LC7a LRFD-LC7b

1.4 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 0.9 0.9 0.9 0.9 0.9 0.9

0 1.6 1.6 1.6 1.6 1 0 0 1 0 0 1 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0

0 0.5 0 0 0 1.6 1.6 1.6 0 0 0 0 0 0 0.5 0.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9

0 0 0.5 0 0 0 0 0 1.6 1.6 1.6 0 0 0 0 0 0.5 0.5 0 0 0.5 0.5 0.2 0.2 0 0 0 0 0 0

0 0 0 0.5 0 0 0 0 0 0 0 1.6 1.6 1.6 0 0 0 0 0.5 0.5 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0.2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 0 0

0 0 0 0 0 0 0.5 -0.5 0 0.5 -0.5 0 0.5 -0.5 1 -1 1 -1 1 -1 0 0 0 0 1 -1 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 -1 0 0 0 0 1 -1 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 -1 0 0 0 0 1 -1

ASD-LC1 ASD-LC2 ASD-LC2i ASD-LC3a ASD-LC3b ASD-LC3c ASD-LC3i ASD-LC4a ASD-LC4b ASD-LC4c ASD-LC5a ASD-LC5b ASD-LC5c ASD-LC5d ASD-LC6a1 ASD-LC6a2 ASD-LC6a3 ASD-LC6a4 ASD-LC6a5 ASD-LC6a6 ASD-LC6b1 ASD-LC6b2 ASD-LC7a ASD-LC7b ASD-LC7i1 ASD-LC7i2 ASD-LC8a ASD-LC8b

D 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0.6 0.6 0.6 0.6 0.6 0.6

L 0 1 1 0 0 0 0 0.75 0.75 0.75 0 0 0 0 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0 0 0 0 0 0

Lr 0 0 0 1 0 0 0 0.75 0 0 0 0 0 0 0.75 0.75 0 0 0 0 0.75 0.75 0 0 0 0 0 0

H 0 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6

S 0 0 0 0 1 0 1 0 0.75 0 0 0 0 0 0 0 0.75 0.75 0 0 0.75 0.75 0 0 0 0 0 0

R 0 0 0 0 0 1 0 0 0 0.75 0 0 0 0 0 0 0 0 0.75 0.75 0 0 0 0 0 0 0 0

Fa 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Di 0 0 0.7 0 0 0 0.7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.7 0.7 0 0

W 0 0 0 0 0 0 0 0 0 0 1 -1 0 0 0.45 -0.45 0.45 -0.45 0.45 -0.45 0 0 0.6 -0.6 0 0 0 0

Wi 0 0 0 0 0 0 0.7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.7 -0.7 0 0

E 0 0 0 0 0 0 0 0 0 0 0 0 0.7 0.7 0 0 0 0 0 0 0.525 -0.525 0 0 0 0 0.7 -0.7

Example 2.3

A Beginners Guide to ASCE 7-10