Special Seismic Load Combinations has to consider as well for both allowable stress design and strength design in accordance to UBC-97 section 1612.4 as follows:Įarthquake Loads and Modelling Requirements: This is also known as service load combinations. When allowable stress design (working stress design) is used, the following are the load combination to consider. READ ALSO: How Important is the Load Combinations in Structural Designį1= 1.0 for floors in places of public assembly, for live load in excess of 100 psf (4.9kN/m2), and for garage live load.į2= 0.7 for roof configurations (such as saw tooth) that do not shed off the structure) These are also known as ultimate load combinations:

Ak= load or load effect arising from extraordinary event AĪccording to ASCE7-10 section 2.3.2, buildings and other structures, components, and foundation shall be designed so that their design strength equals or exceeds the effects of the factored loads in the following combinations.Let us bear in mind that the use of design load and load combinations is depending on the approved code and standards authorize by your local authority having jurisdiction.īefore we proceed into the lists of load combinations, let us take a look at the following symbols used: In this article, we will emphasize the design load combinations as recommended by ASCE7-10 for basic design load combinations with the touch of UBC97 seismic load combinations. By the ASCE7-10 (section 1.2.1) code definition, strength design is the product of the nominal strength and a resistance factor while the allowable stress design is composed of computed forces produced in the member by factored loads that shall not exceed the member design strength.Įach design code and standards had a different recommendation when it comes to loading combinations. dead load superimposed dead loads and live loads that are combined together to come up for a strength design and allowable stress design. Generally, load combination is composed of individual loads, i.e. ASCE7-2010, Design Load Combinations, UBC 97Īfter establishing the design loads of the proposed project, the next thing to consider is to determine the appropriate design load combinations.

Load combination uls in midas civil