Electrical & Mechanical Installations
Electrical and Mechanical Installation Execution
We execute mechanical and electrical installations in step with the structure, not as work that starts once the frame is already finished. MEP drawings are coordinated with the structural and architectural BIM model before a single pipe or cable is cut on site, so clashes get resolved on screen instead of with a saw against finished concrete or steel.
What We Execute
Electrical Installations
• Low-voltage power distribution, switchboards, and cable routing
• General and emergency lighting
• Grounding system and lightning protection
• Infrastructure for special systems (fire alarm, CCTV, network) coordinated with the architectural drawings
Mechanical Installations (HVAC & Piping)
• HVAC systems and air ductwork
• Domestic hot and cold water piping, drainage, and stormwater
• Heating installations (boiler room, radiators, or fan coil units)
• Structural penetrations (openings, sleeves) coordinated in advance, not cut into concrete after the fact
Fire Suppression Systems
• Sprinkler network and fire piping
• Fire pump room and water storage tank
• Fire alarm and suppression systems matched to the building’s occupancy
Why BIM Coordination Before Execution Matters
Clashes between HVAC ductwork routes, fire piping, concrete beams, and cable trays are the most common cause of delay and field rework on building projects. By coordinating the MEP, structural, and architectural BIM models before execution:
• Physical clashes (such as ductwork hitting a main beam) are caught and resolved on screen, not with a saw on site
• Exact opening and sleeve locations for MEP penetrations are built into the structural drawings from the start
• Sequencing between structure, MEP, and finishing work is defined as one coordinated schedule
• The cost of field fixes — cutting rebar, local strengthening, delayed finishing — drops sharply
Execution Process
1. BIM model coordination: MEP drawings are checked against the structural and architectural model, and clashes are identified and resolved before execution begins
2. Rough-in installation: piping, cabling, and required openings are installed alongside the structural work
3. Equipment and network installation: switchboards, HVAC units, pumps, and piping networks are installed once shell-and-core work is complete
4. Testing: pressure testing for piping, insulation and grounding tests for electrical systems, and functional testing of the fire suppression system
5. Commissioning and handover: final equipment start-up, operator training, and delivery of technical documentation (as-built drawings, O&M manuals)
Standards and Quality Control
Installation execution follows Iran’s National Building Regulations:
• Part 13: design and execution of building electrical installations
• Part 14: building mechanical installations
• Part 3: fire protection of buildings
• Supplementary international standards (such as NFPA) for fire suppression system design on projects with specific occupancy requirements
Piping pressure tests, grounding resistance measurements, and functional testing of the fire alarm and suppression system before handover are part of the standard quality control routine.
Material and Equipment Quality Control
Sizing cable cross-sections and breaker capacity against the project’s actual calculated loads — not just a generic standard table — checking manufacturer certificates for electrical equipment (panels, breakers), and matching pipe material (copper or polymer, for example) to the system’s use and working pressure are part of our procurement process. This check happens before equipment is ordered, so field substitutions or rework are kept to a minimum.
Coordination With the Rest of the Project
Because excavation, structural execution, and MEP installation can all run under one technical team, the exact location of vertical shafts, the boiler room opening, and the main duct routes are fixed as early as the foundation and frame design stage and carried into the structural execution drawings. That coordination removes the need to modify a structure that’s already been built. Why Ziggurat • MEP, structure, and architecture coordinated under one technical team, not three separate contractors running three schedules • The same integrated approach we apply to excavation and structural execution carries through to MEP installation • BIM model coordination before execution to eliminate physical clashes and reduce field rework • Documented handover with as-built drawings and test reports
Frequently Asked Questions
Do you execute MEP installations separately from the structure?
Yes. If the structure was or is being executed by another team, we review the drawings, coordinate with the structural contractor, and take on electrical and mechanical installation independently.
What difference does BIM coordination actually make to the final result?
Most common clashes between ductwork, piping, and structure end up as local rebar cutting or schedule delays once they’re discovered on site. Catching the same clashes on the BIM model removes that cost and delay from the project.
At what stage should MEP get involved in the project?
As early as the structural design stage. Exact opening, sleeve, and routing locations need to be built into the structural drawings before the frame is executed, not cut in after the concrete is poured.
What fire suppression systems are required for which buildings?
Sprinkler and fire alarm requirements vary by occupancy type and floor area; this is determined during design in accordance with Part 3 of the National Building Regulations.
Does routing pipes and cables through walls and slabs weaken the structure?
Any MEP penetration through structural elements — especially beams and slabs — has to be reviewed and approved by the structural designer in advance; opening locations and diameters are set in the structural execution drawings so load-carrying capacity isn’t compromised. That’s exactly what BIM coordination before execution is meant to guarantee.