1

Plan and prepare for work.

1.1

Work instructions are obtained from relevant information, confirmed and applied to planning and preparation.

1.2

Work health and safety (WHS) requirements are followed according to safety plans and policies.

1.3

Signage and barricade requirements are identified and implemented.

1.4

Plant, tools and equipment selected to carry out tasks are consistent with job requirements, checked for serviceability, and faults are rectified and reported before work begins.

1.5

Material quantity requirements are identified and calculated according to plans, specifications and quality requirements.

1.6

Materials appropriate to the work application are obtained, prepared, safely handled and located ready for use.

1.7

Environmental requirements are identified for the project according to environmental plans and statutory and regulatory authority obligations.

1.8

Scaffolding is erected according to job and WHS requirements.

2

Set out and prepare arch work.

2.1

Location of arch is set out on base or footing for stone construction according to job drawings and specifications.

2.2

Wall or columns are constructed according to job drawings and specifications up to level of springing line of arch.

2.3

Supports are designed and constructed for ease of release without jarring stonework.

2.4

Arch centring is raised according to specified height, located level across springing line and crown, and supported according to workplace requirements.

3

Construct arch with regularly cut stone.

3.1

Stones are cut according to job drawings and specifications.

3.2

Pre-cut stones are checked for conformity with job specifications.

3.3

Mortar is mixed according to job specifications and relevant standards as required.

3.4

Central keystone is established and stones are laid to form arch according to job drawings and specifications.

3.5

Regular stone is laid to form courses, and bond is maintained according to job drawings and specifications.

3.6

Stones are cut, or pre-cut stones are used, to complete courses and abut arch stones.

3.7

Joints are made within specified tolerance while maintaining alignment and plumb of stone face.

4

Construct arch with irregular voussoirs forming stepped extrados.

4.1

Voussoirs/wedge stones that are delivered pre-cut are checked for conformity to design and order.

4.2

Keystone of archway is positioned centrally and designed voussoirs are laid around centre to form arch.

4.3

Regular stones are laid where voussoirs are designed to correspond with courses.

4.4

Random regular stones are laid where voussoirs are not designed for regular gauged courses.

5

Construct arch with irregular stones.

5.1

Stones are pre-cut, or set out and cut, to suit shape of designed arch.

5.2

Keystones are laid at crown and other arch stones are laid over centre to form arch to specifications.

5.3

Wall is constructed of random rubble or random squared ashlar to match curved extrados according to arch specifications.

5.4

Joints are made with mortar, with stones selected and matched close to abutting stones, and bond strength is maintained.

5.5

Joints are made to specifications with wall maintained in alignment and plumb.

5.6

Mortar joints are struck and finished according to specifications for finish.

6

Clean up.

6.1

Stonework is cleaned, area cleared of waste, and materials and equipment are removed.

6.2

Waste and unwanted materials are disposed of safely.

6.3

Unused materials are stored or stacked.

6.4

Tools and equipment are cleaned, maintained and stored.