Tim_Crouse
Structural
- Dec 28, 2020
- 12
Hello Engineers
My background is in electrical engineering but I am helping to design an equipment slab (which will eventually be reviewed by a PE).
I have designed the slab using the PCA method and Back checked it with the GRDSLAB spreadsheet that is available online.
Does anyone have a set of worked calculations that may be shared related to a Slab on Grade Design? I would really like to brush up on the math behind the PCA
method and the GRDSLAB spreadsheet. User R13 (as well as others provided some guidance to the full set of calculations that should be performed in a situation like this):
-Basic Slab on Grade Calculation, Eg slab thickness and reinforcement requirements (primarily for crack control in this situation)
-Eccentric loading of the slab as only 2/3rds of the slab will hold equipment, the other 3rd is for future use
-Wind Loading on of Non-Structural Components
-Seismic Verification of the Designed Equipment Slab
If anyone has suggestions or design tips for slabs on grade please share
-For example, is there a minimum psi requirement for concrete when anchors will be embedded? I came across an article that 4,000 psi is required when embedding achors.
I never came across that before so it was a surprise to me.
-When dealing with a #57 aggregate subbase course how is the compaction properly defined on the prints as you cannot actually compact stone.
I currently have it defined as "Tightly interlock such that all excess volume is removed"
-When asking for the Soils Report should I request samples be taken at each end the slab will be placed to bring to light any issues that may be discovered when the soils reaction is calculated (I hope I stated that correctly)? Basically, how do I verify that slab will not sink at one end even if the placement detail calls for 95% compaction?
Thanks In Advance
-Tim C.
Sent From My TI-84+
My background is in electrical engineering but I am helping to design an equipment slab (which will eventually be reviewed by a PE).
I have designed the slab using the PCA method and Back checked it with the GRDSLAB spreadsheet that is available online.
Does anyone have a set of worked calculations that may be shared related to a Slab on Grade Design? I would really like to brush up on the math behind the PCA
method and the GRDSLAB spreadsheet. User R13 (as well as others provided some guidance to the full set of calculations that should be performed in a situation like this):
-Basic Slab on Grade Calculation, Eg slab thickness and reinforcement requirements (primarily for crack control in this situation)
-Eccentric loading of the slab as only 2/3rds of the slab will hold equipment, the other 3rd is for future use
-Wind Loading on of Non-Structural Components
-Seismic Verification of the Designed Equipment Slab
If anyone has suggestions or design tips for slabs on grade please share
-For example, is there a minimum psi requirement for concrete when anchors will be embedded? I came across an article that 4,000 psi is required when embedding achors.
I never came across that before so it was a surprise to me.
-When dealing with a #57 aggregate subbase course how is the compaction properly defined on the prints as you cannot actually compact stone.
I currently have it defined as "Tightly interlock such that all excess volume is removed"
-When asking for the Soils Report should I request samples be taken at each end the slab will be placed to bring to light any issues that may be discovered when the soils reaction is calculated (I hope I stated that correctly)? Basically, how do I verify that slab will not sink at one end even if the placement detail calls for 95% compaction?
Thanks In Advance
-Tim C.
Sent From My TI-84+