Lesson Summary 19.11.07 M. S. Martin 21/11/07

Flooring – click your mouse to bring up each point Two main types of construction Platform flooring & Cut in Floors (typically strip flooring is used) Click mouse again to look at the sketches opposite & review your notes from P20 Cut in floors Platform Floors

Strip Flooring Face fixed or secret nailed Undercut but joints or Laying & Clamping – click mouse to bring in each point Select the longest run of flooring String a line through middle of building parallel to outside walls Lay a run of boards along this line Note: in small rooms you might start from one wall and work towards the other Cut and lay say 4 runs of board on each side of centre Cramp & fix Continue laying & cramping boards in sections of 6 to 8 board maximum When you get close to the wall you will need to use an alternative to floor clamps, timber or a chisel Undercut but joints or Or use end matched boards

Platform floors Types Structural Grade particle board Plywood Compressed cement sheet Sheet sizes vary in thickness which effects joist span 450 or 600 centres

Calculations Review your workbook calc’s Look at the sketch below: When working out quantities of floor boards to suit a particular room in a house, we calculate the amount of boards using effective cover per square metre of floor area, see the simple description below. 1.0 x 1.0 = 1.0m² = 1.0m = 1000mm For the purpose of the example, let’s say our floor boards have an effective cover of 86mm, therefore: 1000 or 1.000 = 11.627 86 .086 Which means you can lay 11.627 lineal metres of floor boards per / m² of floor area Review your workbook calc’s 1.0m 1.0m

Practical Assessment Bearer & Joist exercise in basement Demonstration of flooring clamps & strip flooring Explanation of different set out for sheet flooring & strip.