CN4009 Shoring, Scaffolding and Formwork Syllabus:
CN4009 Shoring, Scaffolding and Formwork Syllabus – Anna University PG Syllabus Regulation 2021
OBJECTIVE:
To disseminate knowledge about detailed planning.
To impart knowledge about materials used in formwork.
To learn design of formwork and shores.
To disseminate knowledge about erection of form work.
To impart knowledge about design of formwork for domes, shells, and tunnels.
UNIT I PLANNING, SITE EQUIPMENT & PLANT FOR FORM WORK
Introduction – Forms for foundations, columns, beams walls etc., General objectives of formwork building – Planning for safety – Development of a Basic System – Key Areas of cost reduction – Planning examples. Overall Planning – Detailed planning – Standard units – Corner units – Pass units – Calculation of labour constants – Formwork hours – Labour Requirement – Overall programme – Detailed programme – Costing – Planning crane arrangements – Site layout plan – Transporting plant – Formwork beams – Scaffold frames – Framed panel formwork – Formwork accessories.
UNIT II MATERIALS ACCESSORIES PROPRIETARY PRODUCTS & PRESSURES
Lumber – Types – Finish – Sheathing boards working stresses – Repetitive member stress – Plywood – Types and grades – Jointing Boarding – Textured surfaces and strength – Reconstituted wood – Steel – Aluminum – Hardware and fasteners – Nails in Plywood – Allowable withdrawal load and lateral load. Pressures on formwork – Examples – Vertical loads for design of slab forms – Uplift on shores – Laterals loads on slabs and walls.
UNIT III DESIGN OF FORMS AND SHORES
Basic simplification – Beam formulae – Allowable stresses – Deflection, Bending – Lateral stability – Shear, Bearing – Design of Wall forms – Slab forms – Beam forms – Column forms – Examples in each. Simple wood stresses – Slenderness ratio – Allowable load vs length behaviour of wood shores – Form lining Design Tables for Wall formwork – Slab Formwork – Column Formwork – Slab props – Stacking Towers – Free standing and restrained – Rosett Shoring – Shoring Tower – Heavy Duty props.
UNIT IV BUILDING AND ERECTING THE FORM WORK
Carpentry Shop and job mill – Forms for Footings – Wall footings – Column footings – Sloped footing forms – Strap footing – Stepped footing – Slab form systems – Sky deck and Multiflex – Customized slab table – Standard Table module forms – Swivel head and uniportal head – Assembly sequence – Cycling with lifting fork – Moving with table trolley and table prop. Various causes of failures – ACI – Design deficiencies – Permitted and gradual irregularities.
UNIT V FORMS FOR DOMES AND TUNNELS, SLIP FORMS AND SCAFFOLDS
Hemispherical, Parabolic, Translational shells – Typical barrel vaults Folded plate roof details – Forms for Thin Shell roof slabs design considerations – Building the forms – Placing concrete – Form removed -Strength requirements -Tunnel forming components – Curb forms invert forms – Arch forms – Concrete placement methods – Cut and cover construction – Bulk head method – Pressures on tunnels – Continuous Advancing Slope method – Form construction – Shafts. Slip Forms – Principles -Types – advantages – Functions of various components – Planning -Desirable characteristics of concrete – Common problems faced – Safety in slip forms special structures built with slip form Technique – Types of scaffolds – Putlog and independent scaffold -Single pole scaffolds – Truss suspended – Gantry and system scaffolds.
OUTCOME:
On completion of this course, the student is expected to be able to
CO1 Explain detailed planning of formwork, plant, and site equipment.
CO2 Select material accessories for formwork connection and analyze pressures on formworks.
CO3 Design the forms and shores.
CO4 Apply the knowledge of erecting forms for beams, slabs, columns, walls, and causes of failures.
CO5 Apply the knowledge of forms and their erection for domes and tunnels, types of slip forms, and scaffolds.
REFERENCES:
1. Austin, C.K., Formwork for Concrete, Cleaver -Hume Press Ltd., London, 1996.
2. Hurd, M.K., Formwork for Concrete, Seventh Edition, American Concrete Institute, Detroit, 2016
3. Michael P. Hurst, Construction Press, London and New York, 2003.
4. Robert L. Peurifoy and Garold D. Oberlender, Formwork for Concrete Structures, McGraw – Hill, 2010.
5. Kumar Neeraj Jha, Formwork for Concrete Structures, 2017