This PowerPoint helps students to consider the concept of infinity.
Wt5912 unit5 week7
1. WT5912TECHNOLOGY EDUCATION & WORKSHOP PRACTICE 2: MATERIALS AND CONSTRUCTIONUnit 5 – Week 7 Planning Permission to Subfloor Construction Department of Design & Manufacturing Technology Lecturer/Teacher: Mr. Joseph Lyster Academic Year 2011: Spring Semester Technical Support: Mr. Joe Murray & Mr. Richie Hennessy Notes prepared by: Mr. Joseph Lyster
2. WT5912 Cork Rural Design Guide Department of Design & Manufacturing Technology
51. WT5912 Strip Foundation Traditional Strip foundation Most commonly used Usual 1050X 350mm Suitable for – Average – Good bearing capacity soils Not suitable for – Very soft clays Silt Peat Badly made – up - ground Department of Design & Manufacturing Technology
52. WT5912 Strip Foundation Stepped Strip foundation Sloping sites Reduce excavation Step depths 112mm or 225mm Overlap of concrete Minimum 300mm Not less than depth of concrete foundation Department of Design & Manufacturing Technology
53. WT5912 Strip Foundation Wide Strip foundation Not common Reinforced Transverse reinforcement Resist tensions Wider than 900mm Suitable for – Ground with low bearing capacity Expensive Department of Design & Manufacturing Technology
54. WT5912 Deep Foundation Deep Strip foundation Rests on suitable strata Excavate 900mm or more Trench filled within 150mm of ground level Width depends on depth Department of Design & Manufacturing Technology
55. WT5912 Raft Foundation Raft foundation Suitable for – Low load bearing soils Soft natural ground Very soft clays Silt Peat Made – up – ground Average – Good bearing capacity soils instead of strip foundations Department of Design & Manufacturing Technology
56. WT5912 Raft Foundation Raft foundation Concrete slab Reinforced slab Up to 300mm thick Whole building area Pavement All Loads transmitted Slab thicker under load bearing walls Department of Design & Manufacturing Technology
57. WT5912 Pile Foundation Carry and transfer loads Subsoils of poor bearing capacity Deeper soil and rock of a high bearing capacity Avoids excessive excavation Plan of pile positions Department of Design & Manufacturing Technology
58. WT5912 Pile Foundation Made from Wood Steel Concrete Placed in ground Driven Drilled Jacked Department of Design & Manufacturing Technology
59. WT5912 Heavy Machinery Equipment To clear site Hymac’s JCB’s To remove / move materials Tractors Trailers Dumpers Department of Design & Manufacturing Technology
60. WT5912 Site Entrance Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
61. WT5912 Site Clearance Large bucket Used to clear site’s topsoil 1050mm bucket External – cavity leaf wall foundations 350 mm bucket Internal – single leaf wall foundations Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
62. WT5912 Site Clearance/Excavation Perimeter trenches dug with 1050mm bucket Internal trenches dug with 350 mm bucket Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
63. WT5912 Excavation Open Timbering Close Timbering Department of Design & Manufacturing Technology
65. WT5912 Excavation/Foundation Preparation Mild steel bars Provide tensile strength Min. 25mm from surface Prevents rusting Adequate depth to support Spacers Position reinforcing bars Provide the necessary cover Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
66. WT5912 Laying Foundation Cement trucks pull in on site Concrete poured directly into trench Filled up level with tops of pegs Levelled roughly with shovels Top of wooden peg to which the foundation will be levelled to Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
67. WT5912 Laying Foundation Tapered off level with tamping board Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
68. WT5912 Laying Foundation Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
69. WT5912 Foot/Rising Walls Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
70. WT5912 Foot/Rising Walls Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
71. WT5912 Foot/Rising Walls Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
72. WT5912 Foot/Rising Walls Provision for Services Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
73. WT5912 Foot/Rising Walls Hard-core fill Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
74. WT5912 Foot/Rising Walls Radon/DPC/Insulation Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
75. WT5912 Foot/Rising Walls Plumbing Images courtesy of: Mr John Joyce Department of Design & Manufacturing Technology
