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In: Civil Engineering

As per ASCE 37-02 mention the standard loading of Combined construction loads (personnel, equipment, and materials)...

As per ASCE 37-02 mention the standard loading of Combined construction loads (personnel, equipment, and materials) based on the level of use for the working surface.

Sparsely populated with personnel; hand tools; very small amounts of construction materials

sf
Sparsely populated with personnel; hand operated equipment; staging of materials for lightweight construction
Concentrations of personnel; staging of materials for average construction
Material placement by motorized buggies; staging of materials for heavy construction.

Solutions

Expert Solution

The factors specified by the code ASCE-37 are considering the most uncertainities can can arise during the construction all combined such that there is only 5% of failure propability is there. Incase the designer wanted to not consider such over estimated factors for design He/She may use the manufacturers manual for taking down exact weight of the equipment and for the density of the material to calculate the exact weight. Then the code specifies that load has to be multiplied with 1.3 as a factor. The dynamic effects of fluid flowing inside pipelines during the construction, machine vibrations,vibrations due to concrete lifting electronic mechanisms, etc shall be calculated saperately.

Case 1) Sparsely populated with personnel, hand tools, small amount of construction material.

Case 2) Sparsely populated with personnel; hand operated equipment; staging of materials for lightweight construction.

Case 3) Concentrations of personnel; staging of materials for average construction

Case 4) Material placement by motorized buggies; staging of materials for heavy construction.

As we can observe the loading effect is incresing from Case 1 to Case 4 so we can definitly say that the factors Cp,Cvml,D are in increasing order from Case 1 to Case 4. But designer need to be as specific as possible incase not going along with codal factors.

Also the area of effect may also be more for heavy equipments and load concentrations, as the load distribution for one person can effect 300mm x 300mm (ASCE table 4-1). This can be calculated by experienced professional based on their expertise and judgement. If we go into more precise loading considerations it is as good as the post research and analysis results that we are seeing now in the codal provisions. As there has been very regorious research and analysis to produce code as a "provision" in structural design.

I hope that helps, Thank you:)

Ally Wells answered 1 year ago
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