Building Services Integration and Commissioning

Introduction

Modern buildings are coordinated systems rather than isolated assemblies of foundations, frames, walls and finishes. Water supply, drainage, electrical distribution, heating, ventilation and air-conditioning (HVAC), fire protection, lifts and other vertical-transportation systems must be incorporated into the architectural and structural work from the earliest design stages. Their performance depends not only on the quality of individual components, but also on interfaces between systems, spaces, materials, trades and operating procedures.

Building services integration is the planned coordination of services with the structure, envelope, interiors and site infrastructure. Commissioning is the systematic process of verifying, documenting and demonstrating that installed systems perform in accordance with the design intent, statutory requirements and the owner’s operational needs. These activities extend beyond installation. They include design review, constructability analysis, inspection, testing, functional performance testing, operator training and handover.

Poor coordination can result in structural weakening, inaccessible valves, inadequate fire stopping, water leakage, electrical hazards, excessive energy use, unacceptable indoor conditions and costly rework. Conversely, effective coordination improves safety, constructability, maintainability, energy performance and long-term asset value.

Learning Objectives

On completing this chapter, a student should be able to:

1. Explain the principles of integrating building services with architectural and structural construction.
2. Identify major coordination requirements for water, drainage, electrical, HVAC, fire-protection and vertical-transportation systems.
3. Manage service penetrations, sleeves, embedded items, access provisions and fire stopping.
4. Distinguish inspection, testing, balancing, commissioning and handover activities.
5. Develop coordinated documentation, inspection records and commissioning plans.
6. Analyse common integration failures and recommend practical corrective actions.
7. Recognise regulatory, ethical, safety and sustainability responsibilities in services delivery.

1. The Integration Framework

1.1 Design intent and the information chain

Design intent describes what a building system is required to achieve, not merely what equipment is to be installed. For example, an HVAC design intent may require specified indoor temperatures, ventilation rates, humidity limits, acoustic performance and operating schedules. A fire-protection design intent may require reliable detection, alarm notification, suppression and protected escape routes.

The information chain normally develops through the following stages:

• employer’s requirements and operational brief;
• performance specifications and statutory criteria;
• coordinated design drawings and models;
• shop drawings, builders’ work drawings and equipment schedules;
• method statements and inspection-and-test plans;
• installation records and approved changes;
• commissioning procedures and test results;
• operation and maintenance information.

A change at one stage must be assessed for its effects on subsequent stages. Substituting a pump, for example, may alter electrical load, control logic, pipe connections, plant-room space, vibration isolation and maintenance access.

1.2 The coordination hierarchy

Services coordination is most effective when decisions are made in a defined hierarchy:

1. Safety and statutory compliance: fire separation, electrical protection, safe access and emergency operation take priority.
2. Structural integrity: no penetration, chasing or fixing may compromise load-bearing elements without approval.
3. Gravity systems: drainage and other systems requiring falls generally receive early spatial consideration.
4. Large and inflexible systems: major ducts, risers, plant and lift shafts require protected routes.
5. Maintainability: filters, valves, cleanouts, isolators, inspection panels and control devices must remain accessible.
6. Architectural quality: visible grilles, panels, equipment and service routes should be coordinated with finishes and aesthetics.
7. Efficiency and economy: routes should minimise pressure loss, material use, energy consumption and unnecessary complexity.

This hierarchy does not mean that architectural concerns are unimportant. It provides a rational basis for resolving conflicts while preserving the building’s principal performance requirements.

1.3 Coordination methods

Traditional coordination uses separate two-dimensional plans, sections and details. These remain important for construction and approval, but they require careful overlay of structural, architectural and services drawings. Building information modelling (BIM) adds a shared three-dimensional environment in which systems can be spatially coordinated and associated with information such as dimensions, materials, fire ratings and maintenance requirements.

A useful coordination process includes:

• establishing a common coordinate system and level datum;
• confirming model and drawing standards;
• assigning responsibility for each service zone;
• identifying congested areas, risers, plant rooms and ceiling voids;
• conducting geometric clash detection;
• reviewing functional and access clashes;
• recording issues in a responsibility matrix;
• approving resolutions before fabrication or installation;
• controlling revisions and field changes.

A geometric clash occurs when two physical objects occupy the same space. A functional clash may occur even when objects do not intersect—for example, a cable tray may block access to a fire damper, or a valve may be installed above a fixed ceiling without an access panel. Coordination must therefore consider operation, inspection, replacement and emergency response, not just geometry.

2. Integration with Structural and Architectural Construction

2.1 Structural interfaces

The structure provides strength, stability and fire resistance. Services must not reduce these properties. Structural drawings should be reviewed for permitted openings, cast-in sleeves, embedded plates, anchor zones, post-tensioning tendons, reinforcement congestion and restrictions on drilling or coring.

Openings through beams, columns, shear walls and transfer structures are particularly sensitive. Where openings are necessary, they should be designed and approved before construction. Unauthorised cutting of reinforcement or post-tensioning systems can create immediate danger and long-term deterioration.

Slabs commonly contain sleeves for pipes, conduits and ducts. Sleeve locations should be coordinated before concrete placement, checked against reinforcement and surveyed after installation. If a penetration is omitted, later coring should be controlled by a permit system involving the structural engineer and appropriate scanning equipment.

2.2 Architectural interfaces

Architectural coordination concerns appearance, space, environmental quality and user experience. Services must align with reflected ceiling plans, wall build-ups, doors, joinery, sanitary fixtures, access panels and floor finishes. Typical issues include:

• sprinkler heads conflicting with light fittings or bulkheads;
• supply diffusers positioned too close to beams or partitions;
• electrical outlets hidden by furniture or wall finishes;
• inspection panels placed in visually prominent areas;
• sanitary appliances lacking sufficient service zones;
• lift doors and controls conflicting with cladding or finishes;
• roof-mounted equipment affecting waterproofing and appearance.

The correct solution is usually to coordinate early, not to relocate components during finishing work. A late change to a ceiling grille may affect ductwork, controls, acoustic treatment, ceiling modules and fire performance.

2.3 Service zones and risers

A building should be divided into deliberate service zones: plant rooms, vertical risers, horizontal ceiling voids, service corridors, floor distribution zones and external utility areas. Risers require sufficient width for installation, insulation, fire stopping and future maintenance. They also need structural and fire-rated boundaries, drainage provisions where appropriate, and access at suitable levels.

Plant rooms should be planned around equipment removal routes as well as initial installation. Equipment may require replacement through doors, removable panels, lifting beams or roof hatches. The clear space around equipment must account for maintenance activities, not merely manufacturer dimensions.

3. Water Supply and Drainage Integration

3.1 Water supply

Water-supply coordination includes incoming mains, storage tanks, pumps, treatment equipment, distribution pipework, hot-water generation, insulation, controls and sanitary connections. Designers and constructors must coordinate pressure zones, plant-room drainage, pipe supports, access to isolation valves and protection against contamination.

Pipes passing through walls and floors require sleeves or approved penetration systems. Sleeves should accommodate movement, insulation and sealing. Pipework should not be rigidly locked into structural elements where thermal expansion or building movement could cause stress. Flexible connectors, guides and anchors may be required near equipment.

Hot-water systems require attention to scald prevention, dead legs, insulation and temperature control. Cold-water pipework should be protected from unwanted heat gain and condensation. Where drinking-water systems pass through contaminated areas or are connected to other systems, backflow prevention and separation requirements must be addressed.

3.2 Drainage

Drainage is strongly influenced by gravity. Horizontal drains need coordinated gradients, access points, cleanouts and adequate space below slabs or within raised floors. Structural beams, transfer zones and ceiling heights may limit possible routes. Drainage should therefore be coordinated before architectural levels are fixed.

Drainage stacks require offsets to be considered carefully because offsets can affect hydraulic behaviour, rodding access and ceiling space. Floor drains need falls in the finished floor, waterproofing continuity and connection to traps or other prescribed arrangements. Plant rooms containing water-producing equipment should have suitable floor drainage or a documented alternative such as pumped drainage and leak detection.

Drainage penetrations must be sealed against fire, smoke, water and pests as applicable. Flexible collars or movement joints may be necessary where pipes cross expansion joints. Test sections should be planned so that leaks can be detected before ceilings, shafts and finishes conceal the work.

3.3 Water and drainage testing

Testing commonly includes visual inspection, pressure testing of water pipework, flushing, disinfection where required, leak testing of drainage, flow verification and functional operation of pumps, valves and controls. Test pressure, duration and acceptance criteria must come from the approved specification and applicable regulations; they should not be improvised on site.

4. Electrical Services Integration

Electrical systems include utility intake, transformers, switchgear, distribution boards, cable containment, wiring, lighting, emergency power, earthing, lightning protection, communications and controls. Coordination must address routes, segregation, heat dissipation, access, fire rating and electromagnetic compatibility.

Cable trays and conduits require adequate support and should not obstruct mechanical equipment, dampers or access panels. Power and data systems may require physical separation. Emergency circuits, fire-alarm wiring and life-safety systems may require enhanced survivability or protected routing according to governing requirements.

Electrical rooms must remain dry, ventilated and accessible. Water pipes should not pass over critical electrical equipment unless unavoidable and specifically protected. Switchboards need working clearances, door-swing space, lifting routes and safe isolation provisions. Penetrations through electrical-room boundaries must preserve fire and environmental ratings.

Earthing and bonding should be continuous and verified. Metallic pipework, plant, cable containment and structural steel may require bonding in accordance with the electrical design and regulations. Lightning-protection conductors need coordinated routes and separation from sensitive systems where required.

Electrical testing may include continuity, insulation resistance, polarity, earth-fault-loop or equivalent protective-device verification, residual-current protection, phase sequence, functional operation and emergency-power transfer. Only competent persons using calibrated instruments should conduct or certify such tests.

5. HVAC Integration

HVAC integration covers plant, ductwork, pipework, controls, insulation, acoustic treatment, condensate drainage and external interfaces. Major coordination risks occur in ceiling voids, plant rooms, risers and façade zones.

Ductwork requires space for fittings, turning radii, access doors, insulation and fire or smoke dampers. Ducts should not be routed through beams or fire compartments without approved provisions. Fire and smoke dampers require access for inspection, reset and replacement. Flexible connections and vibration isolation are important at fans, pumps and air-handling units.

Condensate drainage must have adequate fall, trap arrangements and access for cleaning. A poorly coordinated condensate route can cause ceiling damage even when the refrigeration or air-conditioning equipment operates correctly. Outdoor air intakes and exhausts must be positioned to avoid short-circuiting, contamination and nuisance to occupants.

Commissioning HVAC systems includes cleaning, pressure or leakage checks where specified, flushing hydronic systems, verifying rotation and safeguards, testing controls, measuring air and water flows, balancing terminal units and confirming indoor conditions. Testing, adjusting and balancing (TAB) should be performed only after systems are complete enough to represent intended operation.

6. Fire-Protection Integration

Fire protection is a coordinated life-safety function comprising detection and alarm, passive fire protection, suppression, smoke control, emergency lighting, protected escape routes and fire-service facilities. Its interfaces are among the most critical in construction.

Every penetration through a fire-rated wall, floor or shaft boundary must use a tested or approved fire-stopping arrangement appropriate to the penetrating material and the construction. Fire stopping is not simply the application of sealant. The system may require collars, wraps, mineral fibre, boards, mortar or proprietary assemblies, and its installation must follow the tested configuration.

Sprinkler pipework must be coordinated with structure, ceilings, lighting, ductwork and partitions. Detector locations should consider air movement, obstructions, high ceilings and access for testing. Fire dampers and smoke dampers require correct installation orientation, access and identification.

Fire doors, risers, electrical systems and HVAC controls must work together during an emergency. For example, an alarm may initiate smoke-control fans, close dampers, release door holders, recall lifts and send signals to a monitoring centre. These cause-and-effect relationships must be documented and tested as an integrated sequence rather than as isolated devices.

7. Vertical Transportation

Lifts, escalators and other vertical-transportation systems require early coordination because they involve structure, architectural finishes, electrical supply, fire strategy, ventilation, drainage and specialist installation tolerances.

Lift shafts must provide accurate dimensions, plumbness, pit depth, overhead clearance, guide-rail fixing zones and safe access. Lift pits may require waterproofing, sump arrangements, lighting, ladders and safe refuge provisions. Machine rooms or machine-room-less equipment still require maintenance clearances and environmental control.

Lift entrances must align with finished floor levels and wall finishes. Tolerances should account for screeds, tiles, stone, cladding and door frames. Electrical supplies, communication links, emergency operation, fire recall and interface with access-control systems need coordinated testing.

Escalators require structural openings, truss support, balustrade clearances, power supplies, guarding and safe access for maintenance. Temporary protection is essential because specialist equipment is vulnerable to damage from subsequent trades.

8. Penetrations, Access and Fire Stopping

8.1 Penetration management

A penetration register should identify each opening by location, size, purpose, responsible trade, structural approval, fire rating, waterproofing requirement, sleeve type and inspection status. Registers are particularly valuable in repetitive buildings where similar openings occur on many floors.

The preferred sequence is:

1. identify the required penetration during design coordination;
2. confirm structural and fire requirements;
3. install sleeve, box-out or cast-in item;
4. inspect before concealment;
5. install the service and movement provision;
6. complete approved sealing and fire stopping;
7. photograph, label and record the completed condition.

8.2 Access for operation and maintenance

An installation is incomplete if it works only while new. Access must be provided to filters, strainers, valves, dampers, cleanouts, control panels, detectors, meters, isolation devices and replaceable components. Access panels should be sized for the task, not merely for visual inspection.

Access routes should be free from sharp edges, electrical hazards, hot surfaces and obstructions. Equipment requiring periodic servicing should not be located where maintenance depends on removing unrelated building elements. The facilities-management team should participate in reviews of plant rooms and service zones.

9. Commissioning as a Project Process

Commissioning begins during briefing and design, not at practical completion. A commissioning plan should define responsibilities, systems, performance requirements, test procedures, documentation, witnessing arrangements and acceptance criteria.

A useful commissioning sequence is:

1. Planning: identify systems, risks, design intent and commissioning authority.
2. Design review: check maintainability, testability, controls and interfaces.
3. Construction verification: inspect materials, installation, labels, supports, insulation and access.
4. Pre-functional checks: confirm readiness, cleanliness, completion, correct settings and safe conditions.
5. Start-up: energise or operate equipment using approved procedures.
6. Functional testing: operate systems under normal, abnormal and emergency conditions.
7. Integrated testing: verify interactions between systems.
8. Performance verification: compare measured performance with approved criteria.
9. Defect correction and retesting: close nonconformities with objective evidence.
10. Handover and seasonal review: transfer information, train operators and revisit performance where conditions vary by season.

The distinction between testing and commissioning is important. Testing may establish that a pump runs or a circuit is continuous. Commissioning determines whether the complete system performs its intended function, including control sequences, interfaces, safety responses and user requirements.

9.1 Records and acceptance

Commissioning records should be traceable to equipment and location. They may include certificates, calibration records, pressure-test results, flushing records, electrical test sheets, TAB reports, fire-alarm cause-and-effect tests, lift certificates, training attendance and outstanding-defect registers.

Acceptance should be based on objective evidence. A signed checklist is not sufficient if the underlying test was not performed correctly. Failed tests should be recorded transparently, investigated and repeated after correction.

10. Handover and Building Readiness

Handover is the transfer of a functioning asset, not merely a collection of documents. The handover package commonly includes:

• approved as-built drawings and models;
• operation and maintenance manuals;
• equipment schedules and warranties;
• statutory certificates and approvals;
• commissioning and test results;
• spare parts and special tools;
• asset registers and identification labels;
• training records and emergency procedures;
• seasonal commissioning requirements;
• defects, exclusions and residual-risk records.

As-built information should reflect actual installed conditions, including approved deviations. Operators need practical training on normal operation, isolation, alarm response, water shut-off, emergency power, fire systems and safe access. Training should be documented and evaluated rather than treated as an informal demonstration.

11. Applied Case: Illustrative University Laboratory Building

Background

A four-storey university laboratory building contains wet laboratories, offices, teaching rooms and specialist ventilation systems. The building includes multiple mechanical risers, a central plant room, emergency power, fire suppression and two passenger lifts.

Problem

During fit-out, the contractor discovered that the ceiling void on the second floor could not accommodate drainage branches, supply ducts, cable trays and sprinkler pipework. Several drainage routes conflicted with a transfer beam. In addition, fire-stopping details had not been selected for the combination of insulated pipes and cable containment.

Analysis

The project team reviewed the coordinated model, structural drawings, reflected ceiling plans and laboratory equipment schedule. The analysis showed that the original coordination had considered geometric clashes but had not adequately reviewed drainage gradients, access to dampers or the tested fire-stopping configuration. It also revealed that a proposed access panel would be blocked by laboratory casework.

Approach and solution

The team established a priority hierarchy based on safety, structural integrity, gravity drainage, maintainability and architectural coordination. The following actions were taken:

• drainage branches were rerouted through a designated service corridor;
• a structural engineer approved a revised opening location before any coring;
• duct dimensions were adjusted and a local ceiling bulkhead was introduced;
• cable trays were separated from wet services and provided with independent supports;
• fire-stopping assemblies were selected from tested manufacturer details;
• access panels were relocated to align with damper and valve positions;
• a penetration register and photographic inspection record were introduced;
• the commissioning plan was expanded to include laboratory exhaust interlocks, fire alarms, emergency power and lift recall.

Outcome

The revised arrangement reduced rework and preserved the transfer beam. Pre-closure inspection identified two incomplete fire-stop installations and one inaccessible valve. These were corrected before finishes were installed. Integrated testing later demonstrated that a fire alarm correctly initiated the specified shutdown and smoke-control sequences while emergency lighting and lift recall operated as designed.

Learning points

The case demonstrates that coordination must include functional access, fire performance and gravity requirements. It also shows the value of early commissioning planning: when control sequences and interfaces are identified before completion, installation records and tests can be designed around them.

12. Challenges, Governance and Contemporary Practice

Common challenges include incomplete design information, late equipment substitutions, fragmented trade contracts, inconsistent drawing revisions, restricted access to concealed work, poor testing records and pressure to conceal defects before completion. These challenges are reduced by clear responsibility matrices, controlled submittals, inspection hold points, competent supervision and transparent nonconformance reporting.

Safety and ethics are central. A professional must not approve concealed work without adequate inspection, falsify test results, ignore an unsafe penetration or accept inaccessible life-safety equipment to protect programme dates. Regulatory compliance is a minimum obligation; designers and contractors should also consider resilience, accessibility, energy use, water conservation, indoor air quality and maintainability.

Digital tools can improve coordination when used properly. BIM, laser scanning, mobile inspection systems, digital twins and sensor data support detection of deviations and better asset information. Artificial intelligence may assist in identifying probable clashes or classifying defects, but it does not replace professional judgement, site verification, statutory approval or responsibility for safety-critical decisions. Data governance is also necessary where building systems collect occupancy, access or operational information.

Best practice is therefore characterised by early involvement of specialists, shared and controlled information, design for testability, disciplined change management, competent installation, independent verification where appropriate, complete records and operator-focused handover.

Chapter Summary

Building services integration coordinates water, drainage, electrical, HVAC, fire protection and vertical transportation with the structure, envelope, interiors and operational requirements of a building. Effective coordination follows a hierarchy that protects life safety and structural integrity while accommodating gravity systems, large plant, maintenance access and architectural quality.

Penetrations must be designed, approved, inspected and sealed with systems appropriate to structural, fire, waterproofing and movement requirements. Access provisions are part of installation quality because valves, dampers, filters, cleanouts and control equipment must remain serviceable throughout the building’s life.

Commissioning is a planned process beginning with design intent and continuing through construction verification, pre-functional checks, start-up, functional and integrated testing, performance verification, training and handover. Testing individual components is not equivalent to proving integrated building performance. Accurate records, controlled changes, competent personnel and ethical reporting are essential to safe and reliable delivery.

Key Terms

Building services integration: Coordination of building systems with structural, architectural and operational requirements.

Commissioning: Systematic verification that installed systems meet design intent and operational requirements.

Design intent: The required functional, environmental and performance outcomes of a system.

Builders’ work drawing: Drawing identifying openings, supports, sleeves and construction provisions required for services.

Riser: A vertical zone used to distribute services between floors.

Service zone: A planned area allocated for routing, installation and maintenance of building systems.

Clash detection: Identification of physical or functional conflicts between building elements or systems.

Penetration register: Controlled record of service openings and their structural, fire and sealing requirements.

Sleeve: An inserted casing that forms or protects an opening for a service.

Fire stopping: An approved system that maintains the fire performance of a barrier around a penetration or joint.

Access panel: Removable panel allowing inspection, operation or maintenance of concealed equipment.

Testing, adjusting and balancing: Measurement and adjustment of HVAC air and water distribution to achieve specified conditions.

Cause-and-effect matrix: Document defining initiating events and the required responses of interconnected systems.

Pre-functional check: Verification that a system is complete and ready for operational testing.

Functional performance test: Test demonstrating that a system performs its intended sequence and function.

Integrated testing: Verification of interactions among multiple building systems.

As-built information: Records showing the actual installed configuration.

Handover: Formal transfer of the completed building, information, training and operational responsibility.

Maintainability: The extent to which a system can be safely inspected, serviced, repaired and replaced.

Review Questions

Short Answer Questions

1. Why must services coordination consider functional clashes as well as geometric clashes?
2. Identify four items that should be included in a penetration register.
3. Distinguish testing from commissioning.
4. Why are drainage systems normally coordinated early in a project?
5. List four typical components of a building-services handover package.

Long Answer Questions

1. Explain a coordination hierarchy for resolving conflicts between structural, architectural and services requirements.
2. Describe the integration requirements of HVAC systems with ceilings, structure, fire compartments and condensate drainage.
3. Explain the purpose and sequence of a commissioning process from design review to handover.
4. Discuss the importance of fire stopping and access provisions in concealed services installations.
5. Analyse the roles of BIM, inspection records and change control in reducing construction rework.

Analytical / Application Questions

1. A contractor proposes to core several openings through a reinforced concrete beam because the installed drainage route conflicts with a duct. Analyse the risks and propose a controlled resolution process.
2. During an integrated fire test, the alarm operates but smoke-control fans fail to start and lift recall does not occur. Develop a systematic investigation and retesting strategy.
3. Prepare a commissioning and handover outline for a small healthcare building containing domestic water, drainage, emergency power, HVAC, fire alarm, sprinklers and one lift.

Multiple Choice Questions with Answers

Question 1

Which coordination issue should generally receive priority over architectural appearance?

A. Choice of decorative grille colour

B. Protection of life safety and structural integrity

C. Location of nonessential artwork

D. Selection of furniture fabric

Correct Answer: B. Protection of life safety and structural integrity

Question 2

What is the principal purpose of a penetration register?

A. To record employee attendance

B. To schedule architectural finishes only

C. To control and document service openings and their requirements

D. To calculate annual energy consumption

Correct Answer: C. To control and document service openings and their requirements

Question 3

Why are drainage routes often coordinated early?

A. They normally require gravity falls and fixed levels

B. They never require access for maintenance

C. They can always pass through structural beams

D. They do not interact with architectural finishes

Correct Answer: A. They normally require gravity falls and fixed levels

Question 4

Which condition represents a functional clash rather than a geometric clash?

A. Two pipes occupying the same physical space

B. A duct intersecting a beam

C. A valve installed where it cannot be reached for maintenance

D. A cable tray overlapping another cable tray

Correct Answer: C. A valve installed where it cannot be reached for maintenance

Question 5

What must an approved fire-stopping arrangement maintain?

A. The decorative colour of the wall

B. The fire performance of the separating construction

C. The operating speed of a lift

D. The water pressure in a domestic pipe

Correct Answer: B. The fire performance of the separating construction

Question 6

Which activity normally occurs before functional performance testing?

A. Demolition of the plant room

B. Pre-functional checks confirming system readiness

C. Removal of all equipment labels

D. Closing the defects register without inspection

Correct Answer: B. Pre-functional checks confirming system readiness

Question 7

What does testing, adjusting and balancing primarily verify in HVAC work?

A. Air and water distribution against specified requirements

B. The structural strength of concrete beams

C. The colour consistency of floor tiles

D. The legal ownership of the building

Correct Answer: A. Air and water distribution against specified requirements

Question 8

Which document defines initiating events and required responses among interconnected systems?

A. Cause-and-effect matrix

B. Door schedule

C. Landscape maintenance plan

D. Furniture inventory

Correct Answer: A. Cause-and-effect matrix

Question 9

Which statement about handover is most accurate?

A. It consists only of giving the owner keys

B. It is complete when equipment is delivered to site

C. It includes operational information, test evidence and training

D. It occurs before systems are tested

Correct Answer: C. It includes operational information, test evidence and training

Question 10

What is the most appropriate response before coring an unplanned opening through a structural member?

A. Proceed immediately to protect the programme

B. Obtain structural review and approval using a controlled process

C. Remove reinforcement without consultation

D. Conceal the opening with finishes

Correct Answer: B. Obtain structural review and approval using a controlled process