GROUND FLOOR CONSTRUCTION (Mass Concrete Surface Bed)
August 4, 2011 Leave a Comment
A mass concrete surface bed is the un-reinforced slab that is supported by the ground, unlike a suspended slab. It can be on fill, which should not exceed 600mm in thickness. The formation may be shaped for thickenings and covered with hardcore and sand bedding or a layer of blinding concrete. It may also need a sheet plastics damp proof membrane, depending on site conditions and building occupancy. Large areas of surface bed are cast in alternate bays.
In Revit, the mass concrete surface bed is drawn using a Floor family which provides quantity, perimeter, area and volume measurements to SkyBIM’s Product Editor.
Example: Mass Concrete Surface Bed 170mm thick on and including 150mm thick sub-base layer laid on DPM
SkyBIM Product Editor Ingredients
Prepare platform to receive surface bed
Area = Revit Area of Floor Slab. See SkyBIM’s Consumption Formula Editor.
Rip and compact platform to 98% mod AASH
Area = Revit Area of Floor Slab
Making good 150mm Thick sub-base below surface bed
Volume = Revit Area of Floor Slab * Sub-base Thickness
350 Micron USB green damp proof membrane
Area = Revit Area of Floor Slab
Finishing top surfaces of concrete smooth with a power float
Area = Revit Area of Floor Slab
30 Mpa unreinforced concrete in surface beds
Volume = Revit Volume of Floor Slab
Mesh reference 193 to surface beds
Area = Revit Area of Floor Slab
Formwork to edge of surface bed
Perimeter = Revit Perimeter of Floor Slab
Saw cut joints 3 x 40mm deep into 5.00 x 5.00m panels
Length = Revit Area of Floor Slab/Area of 5*5m panels (Manual) * Perimeter of 5*5m panels (Manual)
Rake out softboard joint and seal with polysulphide joint sealer
Length = Revit Area of Floor Slab/Area of 5*5m panels (Manual) * Perimeter of 5*5m panels (Manual)
Toggle construction joints to surface beds
Length = Draw Revit Line Based Structural Beam Family
