FOUNDATIONS (GROUND BEAM)
August 21, 2011 Leave a Comment
A ground beam is a reinforced concrete beam for supporting walls, joists, etc., at or near ground level, itself either resting directly upon the ground or supported at both ends by piers.
In Revit, the ground beam is drawn using a Wall family which provides quantity, length, area and volume measurements to SkyBIM’s Product Editor.
Example: Ground Beam 150mm wide x 730mm deep
 |
Typical Ingredients for Ground Beam
Excavation in earth (730mm deep)
Volume = Foundation wall length (from Revit) * Excavation Width (enter manually) * Excavation Height including 50mm Thick Blinding (enter manually) See SkyBIM’s Consumption Formula Editor
Excavation in hard rock based on 5% of volume of excavation
Volume = Excavation volume * 5%
Excavation in soft rock based on 2% of volume of excavation
Volume = Excavation volume * 2%
Cart excess earth from trenches
Volume = Foundation Wall Length (from Revit) * Excavation Width (enter manually) * Excavation Height including 50mm Thick Blinding (enter manually)
Backfilling to trenches
Total Excavation Volume – Total Volume Carted Away
Back excavation in earth for working space
Area = Sides of Foundation Wall Area (from Revit) * 2
Risk of collapse to sides of excavation
Area = Sides of Foundation Wall Area (Revit) * 2
30 Mpa reinforced concrete in foundation ground beams
Volume = Revit Volume
15 Mpa mass concrete in blinding 50mm under foundation ground beams
Volume = Foundation Wall Length (Revit) * Ground Beam Width (Manual) * Blinding Thickness (Manual)
Rough formwork to sides of ground beams
Area = Sides of Foundation Wall Area (Revit) * 2
Mild/High tensile steel reinforcing to concrete ground beams
KG = Ground beams concrete volume x 150kg = total reinforcing to ground beams
SkyBIM Product Editor Screenshot
 |
SkyBIM Product Editor Link
SkyBIM Report View
 |
SkyBIM Consumption Formula Editor Example
 |
