The Difference Between Consultant MEP Models and Contractor MEP Models | Nara

The life blood of any building or engineering undertaking, MEP (M&E) constructing companies are important parts of consolation for individuals who will in the end occupy the constructed areas. Flawless MEP companies require detailed and environment friendly MEP design for design decision-making, correct documentation, efficiency and cost-estimation, building planning, administration and operation of the development undertaking. MEP fashions, and the way they’re used, are key to comprehensively creating MEP design. MEP modelling entails guide MEP fashions and contractor MEP fashions. You will need to perceive the variations between MEP consultants and MEP contractors after which perceive the fashions that serve them each.

In short, MEP consultants consider consumer necessities and supply skilled recommendation on the popular work course of, whereas MEP contractors typically consider consumer necessities and execute the work.

MEP consultants concentrate on offering knowledgeable recommendation on supplies to assist in design determination making for MEP companies. They will analyse and foresee MEP points after which resolve them. MEP consultants create MEP fashions, largely with Revit MEP, which is changing into a more and more most well-liked within the trade, with out being overly involved with all clashes.

MEP contractors management the MEP companies, the scheduling of the work, the labour and ensures that MEP work is accomplished in accordance with the rules, requirements and schedules which were agreed on and ensures that each one the companies are clash-free. MEP contractors add detailed knowledge, similar to numerous supplies portions, and so on., to the MEP fashions acquired from MEP consultants. They seek the advice of structural and architectural fashions and produce clash-free MEP fashions primarily utilizing Revit MEP and Navisworks.

A extra detailed analysis of MEP consultants, MEP guide fashions, MEP contractors and MEP contractor fashions comply with:


The time period MEP guide is mostly used interchangeably with MEP designer or MEP engineer. what it entails to be an MEP engineer, it’s related to grasp that there are 3 fundamental teams of MEP engineering professionals and particular companies they supply. They’re as follows:

Mechanical Engineers design heating, air flow and air con (HVAC) methods.

Design Components:

  • Air distribution
  • Central utility vegetation
  • Utility grasp plan and design
  • Steam, chilled and scorching water distribution
  • Exhaust system design
  • An infection management HVAC
  • Course of piping
  • Constructing management system
  • Constructing vitality modelling, analyses and audits
  • Renewable vitality system design and analyses

Electrical Engineers design electrical methods.

Design Components:

  • Standby energy methods
  • Energy distribution
  • Lighting
  • Renewable vitality system design and evaluation
  • Energy high quality assessments
  • Harmonic evaluation
  • Electrical and communication methods grasp plan and design
  • Phone/knowledge layouts
  • Name methods
  • Safety methods
  • Fault present analyses
  • Arc fault analyses and labelling

Plumbing Engineers design the plumbing methods.

Design Components:

  • Home scorching & chilly water
  • Pure gasoline piping
  • Fuel methods, distribution and alarms
  • Storm drainage methods
  • Acid waste piping
  • De-ionized water methods
  • Reverse osmosis methods
  • Water softening methods

MEP consultants or engineers be certain that buildings are protected, inhabitable and comfy. They manoeuvre by way of plenty of constraints to provide a well-planned, analytical design that ought to work seamlessly and reliably. The MEP drawings that consultants create should depict the above methods individually and in coordinated kind.

These drawings are derived from MEP designs with regards to consumer wants and while there may be some reference to creating their drawings conflict free, this isn’t a main concern for the consultants, or at the very least it has not been traditionally.

BIM is altering a lot of this for consultants as a result of it requires the manufacturing of 3D fashions to create these drawings. With 3D fashions, clashes might be extra simply recognized and may typically make an honest design look very dangerous. As such consultants are paying extra consideration to manufacturing of 3D fashions that do not need apparent clashes, notably in areas similar to plant rooms, risers and fundamental corridors runs.

The necessity to pay nearer consideration on this means has additionally challenged the best way during which MEP consultants design and the way they organise their design workflow. Traditionally, MEP guide groups have been in a position to work in design silos, the place the HVAC designer and drafter labored on a constructing in a single space of the workplace and the piping or electrical design and drafting staff labored in a distinct space of the workplace. While all had entry to 1 one other, aside from some settlement on vertical and horizontal spacing initially of the undertaking, the groups have been left to put out the companies (utilizing 2D drafting device) within the areas as they noticed match – approaching the design of a constructing with a ‘constructing service strategy’. As there was no approach to conflict take a look at 2D drawings simply, they have been then issued to contractors to handle the coordination accordingly, often leading to a number of design modifications by the guide because of area not being deliberate accordingly. With 3D and BIM the strategy is completely different and extra carefully mirrors a ‘constructing zone strategy’, whereby guide modelling groups take a look at an space collectively and mannequin companies in that space collectively. This extra collaborative strategy is additional assisted by instruments similar to ‘work sharing’ in Revit, the place customers can work on the identical space collectively and see the influence of a staff member’s modelling work immediately.

The MEP design drawings that are created from BIM fashions by consultants are subsequently higher than they have been, however there are nonetheless some shortfalls that aren’t all the time addressed and these embody the necessity to permit for becoming or hanging, entry and lagging. Moreover, the fashions could have been created utilizing normal/library parts which can be too small or too massive in comparison with precise procured components {that a} contractor could use.


Though on-site organisation could also be ready prematurely, conflicts and delays should happen for the MEP contractor. MEP coordination drawings are created primarily to stop these issues earlier than they’ve an opportunity to happen and minimise any on-site clashes. A number of the points confronted by MEP contractors embody set up conflicts and time-consuming redesign of MEP parts. MEP coordination drawings tie up a undertaking cohesively. The method of BIM (Constructing Info Modelling) contributes considerably to creating this a actuality. MEP BIM coordination consists of HVAC BIM, piping BIM, and plumbing BIM coordination companies for MEP contractors. This helps in creating detailed plans, elevations and part drawings for MEP companies.

The coordinated and particular person service drawings assist set up groups throughout building. MEP contractors thus present MEP store drawing companies and coordination companies, producing real looking and ready-for-installation store drawings. MEP contractors use BIM coordination and conflict detection companies to amass the data they should determine and resolve clashing interfaces between completely different constructing methods, resolving points within the pre-construction stage and saving prices and time. A number of MEP contractors additionally use Scan to BIM modelling companies, because it makes use of 3D laser scanning expertise to map an as-built surroundings after which transfers the info into BIM software program, similar to Autodesk Revit and Navisworks.

The checks and modifications carried out utilizing these companies by MEP contractors falls in into the method of VDC (Digital Design and Development). The VDC course of reduces a undertaking’s price and time, principally by utilizing coordination drawings to overview the pre-construction design stage and embody particulars of MEP system layouts. The coordination takes into consideration horizontal and vertical views, avoiding clashes between structural framing, ceilings, partitions, gear, lights, mechanical, electrical, plumbing, conveying methods and different companies.

Fashions for MEP contractors signify mechanical, electrical, plumbing, HVAC methods which might be clash-free. To create contractor MEP fashions, the architectural and structural fashions are consulted intimately, and structural parts, similar to concrete beams, metal cores, slabs, columns, and so on., in addition to architectural parts, similar to stairs, doorways, home windows, inside partitions, cladding methods, and so on. are studied along side current guide MEP fashions to provide additional detailed and environment friendly fashions. These fashions assist contractors detect clashes and work out clash-free options and in the end present materials for store drawings or set up drawings or MEP building coordination drawings, which might be utilised on web site.

In contrast to consultants, MEP contractors are accountable for becoming and commissioning of MEP companies and subsequently their fashions will incorporate extra points similar to:

  • Precisely specified parts – as a substitute of library gadgets, they’ll use fashions that will likely be fitted on web site as these could differ in measurement or connection element.
  • Becoming feasibility – the 3D fashions will typically characteristic clevis and trapeze hangars to make sure that the companies might be fitted to ceilings and partitions
  • Accessibility concerns – as companies require upkeep throughout a constructing’s life cycle, the MEP contractor’s fashions will embody entry hatches and entry area to succeed in the weather of the companies that will require upkeep.
  • Fabrication intent – MEP contractors are more and more pushed for quicker supply on web site and subsequently creation of engineering modules for areas similar to plant rooms, risers and corridors can also be integrated of their 3D fashions. It will often lead to off-site manufactured steel-based body buildings that maintain the entire core companies, similar to ductwork, piping, drainage, electrical and hearth companies.

In some ways, the above parts can’t be thought-about by consultants, as they’re creating their fashions too early within the course of. Nonetheless, some points (similar to accessibility) are more and more beginning to characteristic in guide fashions too.

Revit MEP is a well-liked software program device amongst MEP contractors to create 3D fashions, in addition to builder’s working drawings, fabrication drawings, store drawings, collision detection, detailed part evaluations, schedules and invoice of supplies and so on. Store drawings painting plans, elevations and sections. They depict structural grids, composite drawings, electrical part technical drawings, underground and above-ceiling coordination, sheet steel drawings, ductwork drawings, pipe fabrication drawings, plumbing drawings, gear placement, and so on.

Apart from using Revit as a supply platform, the MEP contractors’ course of or strategy for MEP coordination is important, as it’s a ‘constructing zone strategy’, whereby his modelling and coordination groups take a look at all companies inside every space as they mannequin and transform their BIM 3D fashions, utilising Revit’s worksharing characteristic to see one another’s work as they progress. This fashion, clashes are minimised throughout the preliminary phases, and though interference evaluation checks are repeatedly undertaken, they’re there to test tolerances versus figuring out modelling errors and important clashes.

MEP 3D modelling companies, MEP BIM, HVAC BIM and building paperwork are extensively helpful by MEP consultants and MEP contractors within the building trade. Companies that contain 3D MEP coordination and conflict detection guarantee each effectivity and price saving for residential, business, healthcare and training sectors. Appreciating the distinction between MEP guide fashions and MEP contractor fashions, the depth of knowledge they supply and the associated drafting and modelling companies accessible helps plan and execute building tasks expediently.

Source by Kuldeep Bwail

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