Pad Foundations

 

 

 

Pad Data I: Pad

Length xx:

Breadth zz:

Depth:

Basic dimensions of the pad.

Allows you to lock the dimension so it does not change during AutoDesign.

Strip footing:

Set whether the Foundation is a Pad or a strip footing. If you select a footing then ensure the dimension in the direction of the wall is 1000 mm.

Cage Style:

The detailing style is also set to Straight-Bars, Bobed-Bars or full depth U-Bars.

Pad Data I: Column

Width xx:

Width zz:

Basic dimensions of the column allowing for any concrete casing or a concrete plinth. If left to ZERO then it will default to the size of the column in MasterFrame (conservative).   

Centre xx:

Centre zz:

Distance from the edge of the foundation to the centre of the column.  If left to ZERO then it will default to the centre of the foundation.

Plinth height:

The height of any plinth or dwarf column not considered in the MasterFrame/MasterPort analysis. Any horizontal Shear Forces are multiplied by this height to develop an additional moment.

Pad Data I: Reinforcement

Here you change the diameter and spacing of the reinforcement in the pad for the top and bottom bars in each orthogonal direction.

The steel can be in up to 2 zones say Inner zone is 200 c/c, and outer zone is 400 c/c (see BS 8110-1:1997 cl 3.11.3.2).

If zoning is not required then the steel is assumed to be at the first pitch throughout.

You can also define which layer of reinforcement is on the top.

 

Pad Data I: Copy and Paste

You can copy the reinforcement details from one pad and copy them onto another pad.

Alternatively, you can copy these details to all visible pads on the graphics.

 

 

 

 

Pad Data II: Loading

Gk Ult

Partial safety factor on the Density and Surcharge in ultimate load cases.  Defaults to Global value.

Gk Srv

Partial safety factor on the Density and Surcharge in service load cases.  Defaults to Global value.

Surcharge:

Surcharge to top of base kN/m2 applied to whole base. Defaults to Global value.

Density:

Density of the concrete in kN/m3. Defaults to Global value.

SWP:

Safe Working Pressure kN/m2 or the Un-Factored (Service) Bearing pressure used in sizing the pad. The program identifies a loading case as service case if all load factors are equal or less than 1.00. Defaults to Global value.

 

Pad Data II: Walls

Load

Service/working load (kN/m) per meter run.

Note: If no wall projections (faces) are defined then the load is assumed to be total intensity (kN).  

o/s xx

Wall offset parallel to the XX axis (mm). Defaults to centreline of pad.

o/s zz

Wall offset parallel to the ZZ axis (mm). Defaults to centreline of pad.

Faces

Define which faces of the foundation the wall exists on. See example opposite

If NO wall projections (faces) are defined then the load is assumed to be total intensity (kN).

Note - All wall loads are resolved back to the column as a point load and induced moments.