Precast Plank - Structural Topping vs Non-Structural Topping
Precast Plank - Structural Topping vs Non-Structural Topping
(OP)
What is the difference between Structural Topping vs Non-Structural Topping in terms of specifications required or performance requirements?
I understand that structural topping is considered to act compositely with the planks but what is done differently when a structural topping is used vs a non-structural topping. Assuming they are both concrete?
I understand that structural topping is considered to act compositely with the planks but what is done differently when a structural topping is used vs a non-structural topping. Assuming they are both concrete?
EIT






RE: Precast Plank - Structural Topping vs Non-Structural Topping
Do not relay in FRP for mechanical reinforcement in toppigs.
Be aware that the tables for topping use fc=3 ksi in the topping.
Other superior strengths can be used, as seen in the examples.
When no topping ties must be provided to ensure integrity and diaphragm action.
That ACI uses to exclude non-topped structures when diaphragm action is considered (except equivalent performance is met by other design).
Since ACI 318-02 one should repeat the search in 318-08 for the incidences.
Other than that and for composite action all is to follow science of construction, considering what available at the moment. Non composite toppings should normally considered only as weights.
RE: Precast Plank - Structural Topping vs Non-Structural Topping
RE: Precast Plank - Structural Topping vs Non-Structural Topping
I will look through the PCI handbook as I beleive we have a copy (should have thought of this first).
As far as practicality goes - Is specifying a 2" structural topping with WWF reasonable? It seems like in this area, Illinois, most toppings are nonstructural so I want to make sure that I convey this to the contractor.
EIT
RE: Precast Plank - Structural Topping vs Non-Structural Topping
http://www.eng-tips.com/viewthread.cfm?qid=182794
I think most here (Spain) wouldn't blink on using a thin wire mesh to reinforce such topping, bout of course everyone has its advocates.
RE: Precast Plank - Structural Topping vs Non-Structural Topping
RE: Precast Plank - Structural Topping vs Non-Structural Topping
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EIT
RE: Precast Plank - Structural Topping vs Non-Structural Topping
PCI Hollow Core Slab Design Manual