huangyhg

construction clear span!
what is the meaning of maximum construction clear span as indicated in metal deck catalogs? i would appreciate your input.

i'm familiar with "maximum unshored span" which is just the max span of the deck for the wet weight of the concrete without shoring the deck.
i've never heard of maximum construction span.
clearspan is just what it says. it is the clear distance between supports.
ba
...as from the inside of a concrete wall to the other inside of another concrete wall, or between the flanges of two steel beams or purlins. as in "clear" of the supports.
mike mccann
mmc engineering
appreciate the responses. however, i am wondering, why construction clear span; why not just clear span? is there a reason to say construction clear span? is this a term only for metal deck construction?
the canam catalog lists span for various deck types. tables include single, double and triple span. i did not find the term construction clear spanfff"> anywhere. it does seem a bit redundant.
ba
i think it means the maximum span when concrete is poured before you need to shore the deck. i.e. the max span to support the wet weight of concrete and meet strength and deflection criteria.
in the dry and cured state, decks with concrete can span much longer distances. i.e. if you shored the deck when the concrete was poured, you would be able to achieve much longer spans when the concrete has cured.
see the verco catalog they have additional explanations.
oh, and also note when looking at the catalogs there is single,double, and triple span conditions. usually you want to stick with the single condition, because you never know how the contractor will layout his deck.
this term is in the vulcraft deck catalog for non-composite floor deck. i agree that it applies to the strength of the deck during concrete placement. does it also have to do with sdi recommendations for workers walking on the deck during construction?
i agree with indepth. it makes sense. thanks all.
for composite deck p-3615, the canam tables list "maximum unshored span" for various slab thicknesses, deck thickness and single, double or triple spans.
no such listings are given for p-3615 steel deck (non-composite).
ba

__________________
借用达朗贝尔的名言：前进吧，你会得到信心!
[url="http://www.dimcax.com"]几何尺寸与公差标准[/url]