Table of Contents
Task G-19 Rebuilds masonry work
Task descriptor
This task describes the process of removing and reinstalling selected masonry work ranging from small areas to entire assemblies. It involves using proper equipment, support and bracing, as well as matching the existing structure.
G-19.01 Disassembles unit masonry
G-19.01 Disassembles unit masonry
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| G-19.01.01P |
determine plan of action |
plan of action is determined according to assessed cause of deterioration and safe approach |
| G-19.01.02P |
shore surrounding masonry |
surrounding masonry is shored to prevent collapse or further damage during disassembly and reassembly |
| G-19.01.03P |
record placement of masonry units |
placement of masonry units is recorded using documentation methods to ensure accuracy of future placement |
| G-19.01.04P |
remove mortar and masonry units |
mortar and masonry units are removed using tools according to method of disassembly selected |
| G-19.01.05P |
clean salvaged masonry units for reassembly |
salvaged masonry units are cleaned for reassembly using tools and cleaning agents according to job specifications |
| G-19.01.06P |
store salvaged masonry units |
salvaged masonry units are stored in a secure dry area to protect against damage and theft |
Range of variables
- documentation methods include: photography, tagging, sketches
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| G-19.01.01L |
demonstrate knowledge of rebuilding masonry |
identify terminology associated with rebuilding masonry |
| describe historical and current masonry construction techniques |
| describe masonry load patterns, and their characteristics and applications |
| describe natural, mechanical or chemical effects on materials |
| identify types of anchoring systems, and describe their characteristics and applications |
| identify hazards and describe safe work practices pertaining to site, personnel and public safety measures |
| identify types of rigging and hoisting equipment and describe their applications, limitations and procedures for use |
| describe restoration documentation methods |
| G-19.01.02L |
demonstrate knowledge of procedures to disassemble unit masonry |
identify tools and equipment used to disassemble unit masonry, and describe their procedures for use |
| describe procedures to disassemble unit masonry |
| describe procedures to shore surrounding masonry |
| describe procedures to clean and store salvaged masonry units |
Range of variables
- documentation methods include: photography, tagging, sketches
G-19.02 Prepares restoration work area
G-19.02 Prepares restoration work area
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| G-19.02.01P |
remove remaining mortar |
remaining mortar is removed from standing wall and backup wall |
| G-19.02.02P |
clean and restore or replace accessories |
accessories are cleaned and restored or replaced according to job specifications |
| G-19.02.03P |
repair backup wall and existing membrane |
backup wall and existing membrane are repaired according to identified deficiencies and job specifications |
Range of variables
- accessories include: anchors, ties, shelf angles, flashings, loose angle irons, electrical boxes
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| G-19.02.01L |
demonstrate knowledge of rebuilding masonry |
identify terminology associated with rebuilding masonry |
| describe historical and current masonry construction techniques |
| identify types of mortars and associated additives, and describe their characteristics and applications |
| identify types of anchoring systems, and describe their characteristics and applications |
| identify hazards, and describe safe work practices pertaining to site, personnel and public safety measures |
| identify types of rigging and hoisting equipment and describe their applications, limitations and procedures for use |
| describe restoration documentation methods |
| G-19.02.02L |
demonstrate knowledge of procedures to prepare restoration area |
identify tools and equipment used to prepare restoration area, and describe their procedures for use |
| describe procedures to prepare restoration area |
| describe procedures to remove remaining mortar |
| describe procedures to clean and restore accessories |
| describe procedures to repair backup wall and existing membrane |
Range of variables
- documentation methods include: photography, tagging, sketches
- accessories include: anchors, ties, shelf angles, flashings, loose angle irons, electrical boxes
G-19.03 Reinstalls masonry and accessories
G-19.03 Reinstalls masonry and accessories
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| G-19.03.01P |
place and secure related accessories |
related accessories are placed and secured according to drawings and job specifications |
| G-19.03.02P |
match appearance and composition of new material to existing material |
appearance and composition of new material is matched to existing material |
| G-19.03.03P |
lay new or salvaged masonry units |
new or salvaged masonry units are laid according to recorded placement to match appearance of existing or recently disassembled work |
Range of variables
- accessories include: anchors, ties, shelf angles, flashings, loose angle irons, electrical boxes
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| G-19.03.01L |
demonstrate knowledge of rebuilding masonry |
identify terminology associated with rebuilding masonry |
| describe historical and current masonry construction techniques |
| identify types of mortars and associated additives, and describe their characteristics and applications |
| identify types of anchoring systems, and describe their characteristics and applications |
| identify hazards and describe safe work practices pertaining to site, personnel and public safety measures |
| identify types of rigging and hoisting equipment and describe their applications, limitations and procedures for use |
| describe restoration documentation methods |
| G-19.03.02L |
demonstrate knowledge of procedures to reinstall masonry and accessories |
identify tools and equipment used to reinstall masonry and accessories, and describe their procedures for use |
| describe procedures to reinstall masonry and accessories |
Range of variables
- documentation methods include: photography, tagging, sketches
- accessories include: anchors, ties, shelf angles, flashings, loose angle irons, electrical boxes
Task G-20 Repairs and cleans existing masonry work
Task descriptor
This task describes non-destructive methods of restoring masonry work, including repointing and repairing of individual units. Repairs may be done in place, or after removal, and may range from historic fabric to relatively new construction.
Bricklayers clean existing masonry surfaces as part of restoration or after restoration work has been performed so that the surfaces are returned to their original appearance.
G-20.01 Removes deteriorated masonry units
G-20.01 Removes deteriorated masonry units
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| G-20.01.01P |
determine and follow plan of action |
plan of action is determined and followed according to assessed cause of deterioration and safe approach |
| G-20.01.02P |
shore surrounding masonry |
surrounding masonry is shored to prevent collapse or further damage during removal and re-installation |
| G-20.01.03P |
record placement of masonry units |
placement of masonry units is recorded using documentation methods to ensure accuracy of future placement |
| G-20.01.04P |
document shape, size and finished face of non-salvageable masonry units |
shape, size and finished face of non-salvageable masonry units are documented to create templates |
| G-20.01.05P |
remove mortar and entire or damaged portion of masonry unit |
mortar and entire or damaged portion of masonry unit is removed using tools according to method of removal selected |
| G-20.01.06P |
document failures in material |
failures in material are documented for record keeping |
| G-20.01.07P |
clean salvaged masonry units for re-installation |
salvaged masonry units are cleaned for re-installation using tools and cleaning agents according to job specifications |
| G-20.01.08P |
store salvaged masonry units |
salvaged masonry units are stored in a secure dry area to protect against damage according to job specifications |
Range of variables
- masonry units include: bricks, stones, terracotta
- documentation methods include: photography, sketching, tagging
- failures in material include: hairline cracks, spalling, delamination
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| G-20.01.01L |
demonstrate knowledge of removing deteriorated masonry units |
describe terminology associated with removing deteriorated masonry units |
| describe historical and conventional masonry construction techniques |
| describe documentation methods during restoration |
| interpret environmental regulations pertaining to removal and disposal of masonry units |
| identify hazards and describe safe work practices pertaining to removing deteriorated components |
| identify types of masonry units, and describe their characteristics and applications |
| G-20.01.02L |
demonstrate knowledge of procedures to remove deteriorated masonry units |
identify tools and equipment used to remove deteriorated masonry units, and describe their procedures for use |
| describe procedures to remove deteriorated masonry units |
Range of variables
- masonry units include: bricks, stones, terracotta
- documentation methods include: photography, sketching, tagging
G-20.02 Repoints joints
G-20.02 Repoints joints
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| G-20.02.01P |
remove deteriorated mortar from existing joints |
deteriorated mortar is removed from existing joints |
| G-20.02.02P |
clean void |
void is cleaned after removal of defective mortar using water or air pressure |
| G-20.02.03P |
pre-moisten area to be repointed |
area to be repointed is pre-moistened for adhesion of new mortar |
| G-20.02.04P |
fill, compress and tool joints |
joints are filled, compressed and tooled according to established procedures for integrity of new joints |
| G-20.02.05P |
mist joints or cover them with wet burlap |
joints are misted or covered with wet burlap to prevent joint failure |
| G-20.02.06P |
protect surfaces from environmental conditions |
surfaces are protected from environmental conditions |
Range of variables
- environmental conditions include: rain, wind, sun
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| G-20.02.01L |
demonstrate knowledge of repointing joints |
describe terminology associated with repointing joints |
| describe historical and conventional masonry construction techniques |
| describe documentation methods for restoration |
| interpret environmental regulations pertaining to removal and disposal of masonry units |
| identify hazards, and describe safe work practices pertaining to repointing joints |
| describe technique to prevent moisture loss during curing (damp curing) |
| identify types and bonding properties of mortars, and describe their characteristics and applications |
| identify types of admixtures, and describe their characteristics and applications |
| G-20.02.02L |
demonstrate knowledge of procedures to repoint joints |
identify tools and equipment used to repoint joints, and describe their procedures for use |
| describe procedure to repoint joints |
| describe procedures to protect surfaces from environmental conditions |
Range of variables
- documentation methods include: photography, sketching, results of off-site analysis
- admixtures include: colouring, air entrainment agents, waterproofing, bonding agents
- environmental conditions include: rain, wind, sun
G-20.03 Repairs masonry units
G-20.03 Repairs masonry units
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| G-20.03.01P |
determine and follow plan of action |
plan of action is determined and followed according to assessed cause of deterioration |
| G-20.03.02P |
drill masonry |
masonry is drilled for pinning and stitching |
| G-20.03.03P |
mix repair compound |
repair compound is mixed according to manufacturers’ specifications |
| G-20.03.04P |
fill voids, rebuild portions of existing material, or mould masonry units |
voids are filled, portions of existing material rebuilt, or masonry units moulded to match original features of masonry units |
| G-20.03.05P |
rejoin severed or cracked masonry units |
severed or cracked masonry units are rejoined using materials |
| G-20.03.06P |
reattach masonry units to backup wall |
masonry units are reattached to backup wall |
| G-20.03.07P |
replace deteriorated masonry unit face |
deteriorated masonry unit face is replaced with newly cut face using mortar or adhesives |
| G-20.03.08P |
support refaced masonry units |
refaced masonry units are supported using wedges until initial set |
Range of variables
- masonry units include: bricks, stones, terracotta
- materials (for rejoining) include: dowels, threaded pins, epoxies
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| G-20.03.01L |
demonstrate knowledge of repairing masonry units |
describe terminology associated with repairing masonry units |
| describe historical and conventional masonry construction techniques |
| describe documentation methods for restoration |
| interpret environmental regulations pertaining to removal and disposal of masonry units |
| identify hazards and describe safe work practices pertaining to repairing masonry units |
| describe mechanical repair techniques and their applications |
| describe non-mechanical repair techniques and their applications |
| identify types of masonry units, and describe their characteristics and applications |
| identify types of admixtures, and describe their characteristics and applications |
| identify materials used for refacing, and describe their characteristics and applications |
| identify epoxy anchoring systems, and describe their characteristics and applications |
| identify masonry materials that may be affected by cleaning, sealing, waterproofing or damp proofing processes |
| G-20.03.02L |
demonstrate knowledge of procedures to repair masonry units |
identify tools and equipment used to repair masonry units, and describe their procedures for use |
| describe procedures to repair masonry units |
| describe procedures to prepare repair compound |
Range of variables
- masonry units include: bricks, stones, terracotta
- documentation methods include: photography, sketching, results of off-site analysis
- mechanical repair techniques include: stitching, pinning or dowelling, using spiral ties, dispersed hydrated lime (DHL) injections (when using anchors)
- non-mechanical repair techniques include: composite (plastic) repair, Dutchman repair, cutting, refacing, DHL injections
- admixtures include: colouring, air entrainment agents, waterproofing, bonding agents
- materials (for refacing) include: epoxies, acrylics, plastics, DHL
G-20.04 Reinstalls masonry units and accessories
G-20.04 Reinstalls masonry units and accessories
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| G-20.04.01P |
match appearance and composition of existing mortar |
appearance and composition of existing mortar are matched |
| G-20.04.02P |
pre-moisten adjacent surfaces |
adjacent surfaces are pre-moistened for adhesion of new mortar |
| G-20.04.03P |
lay out repaired masonry units |
repaired masonry units are laid out based on recorded placement to match appearance of existing or recently disassembled work |
| G-20.04.04P |
apply mortar to unit and adjacent surfaces |
mortar is applied to unit and adjacent surfaces for total joint integrity |
| G-20.04.05P |
compress and tool joints |
joints are compressed and tooled to match original |
| G-20.04.06P |
mist joints or cover with wet burlap |
joints are misted or covered with wet burlap to prevent joint failure |
Range of variables
- masonry units include: bricks, stones, terracotta
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| G-20.04.01L |
demonstrate knowledge of reinstalling masonry units and accessories |
describe terminology associated with reinstalling masonry units and accessories |
| describe historical and conventional masonry construction techniques |
| describe documentation methods for restoration |
| identify hazards, and describe safe work practices pertaining to reinstalling masonry units and accessories |
| identify types of masonry units, and describe their characteristics and applications |
| describe techniques to prevent moisture loss during curing |
| identify types and bonding properties of mortars, and describe their characteristics and applications |
| identify types of admixtures, and describe their characteristics and applications |
| identify materials used for refacing, and describe their characteristics and applications |
| identify epoxy anchoring systems, and describe their characteristics and applications |
| identify masonry materials that may be affected by cleaning, sealing, waterproofing or damp proofing processes |
| G-20.04.02L |
demonstrate knowledge of procedures to reinstall masonry units and accessories |
identify tools and equipment used to reinstall masonry units and accessories, and describe their procedures for use |
| describe procedures to reinstall masonry units and accessories |
Range of variables
- masonry units include: bricks, stones, terracotta
- documentation methods include: photography, sketching, results of off-site analysis
- admixtures include: colouring, air entrainment agents, waterproofing, bonding agents
- materials (for refacing) include: epoxies, acrylics, plastics, DHL
G-20.05 Cleans existing masonry surfaces
G-20.05 Cleans existing masonry surfaces
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Skills
| Reference Code |
Performance Criteria |
Evidence of Attainment |
| G-20.05.01P |
determine cleaning method |
cleaning method is determined according to surface condition |
| G-20.05.02P |
test cleaning method |
cleaning method is tested on small area |
| G-20.05.03P |
mix and apply restoration cleaning agents |
restoration cleaning agents are mixed and applied according to manufacturers’ specifications and environmental regulations |
| G-20.05.04P |
prevent absorption of restoration cleaning agents |
area is pre-soaked to prevent absorption of restoration cleaning agents |
| G-20.05.05P |
use micro-abrasive cleaners |
micro-abrasive cleaners are used according to material to avoid damage |
| G-20.05.06P |
rinse cleaned area with water |
cleaned area is rinsed with water to eliminate any traces of restoration cleaning agents |
Range of variables
- restoration cleaning agents include: acids, non-acid stain removers
- micro-abrasive cleaners include: soda, water, nut shells, baking soda, glass
Knowledge
| Reference Code |
Learning Outcomes |
Learning Objectives |
| G-20.05.01L |
demonstrate knowledge of cleaning existing masonry |
describe terminology associated with cleaning existing masonry |
| describe historical and conventional masonry construction techniques |
| interpret environmental regulations pertaining to cleaning agents |
| identify hazards, and describe safe work practices pertaining to cleaning surfaces and handling products or equipment |
| identify types of masonry units, and describe their characteristics and applications |
| identify masonry materials that may be affected by cleaning processes |
| describe types of soiling and stains |
| identify micro-abrasive materials, and describe their characteristics and applications |
| identify restoration cleaning agents, and describe their characteristics and applications |
| identify application methods when cleaning, and describe their characteristics and applications |
| G-20.05.02L |
demonstrate knowledge of procedures to clean existing masonry |
identify tools and equipment used to clean existing masonry, and describe their procedures for use |
| describe procedure to clean existing masonry |
| describe operating procedures for cleaning equipment and their applications |
| describe cleaning methods to avoid damage |
| describe procedures to protect surrounding environment, materials or assemblies during and after cleaning |
Range of variables
- masonry units include: bricks, stones, terracotta
- micro-abrasive cleaners include: soda, water, nut shells, baking soda, glass
- restoration cleaning agents include: acids, non-acid stain removers
- application methods include: brushing, rolling, spraying
- cleaning methods include: laser, chemicals