Who Will Make Coordination Drawing

One way is to have an architecture/engineering consulting entity draw up the plans (including coordination), solicit and receive subcontractor bids, and supervise the overall work. If no such consulting entity is engaged, it falls to the owner to do this, or to ensure that the subcontractors confer with each other to avoid interferences.

If subcontractors cannot take decisions the Consultant will take final decision which should be accepted by all others. They draw different services in separate layers and if one service interferes with another(eg: light fitting and AC duct) consultant will have the final say.

Your understanding is correct.

We use a system called BIM - "Building Information Modeling"

Soon after issuance of project contracts to the various trade contractors, each contractor is responsible to submit "Projected As Built Drawings" in CAD format to the General Contractor or Project Management Firm (which ever applies).

The GC or PM then overlays all of the submitted PABD's using CAD and is able to identify construction interferences and conflicts amongst the trades.

Once the overlays are produced, each contractor receives a set and is expected to follow these drawings during construction. Periodically during the project the various contractors re-submit PABD's (sometimes weekly on larger projects) so the construction drawings can be updated.

While the BIM system can be time consuming in it's self, it is a great system used to keep the project moving forward without delays and re-work.

Go to this LINK and scroll down to the heading "Contractor"

I have never seen this task left to the owner. This is a shared task between the trade contractors.

Reading your question, I wonder... Are you asking about the drawings that each individual trade work from, and record their actual real world 'as constructed' information?

As mentioned, the site plan contains the information about drainage, lot lighting, fencing, water features, building layout, grading and landscaping... This is all considered by varied design professionals, and collected into one plan.

Each trade is required to ACCURATELY record the ACTUAL location of each element of their own trade. This is usually done on a drawing as prepared by the design professional, and amended with actual 'in place' dimensions. Each trade must turn in a clean 'As Built' drawing for their work. This is especially necessary for hidden work.

Regarding submittal drawings from any subcontractor: These are IMPORTANT for the project records, and VERY IMPORTANT for the construction of the project! Sometimes a contractor will want to use, and the design professional will approve, something that is not quite as described in the original bid document. You MUST refer to the latest approved submittal data for each individual craft.

Or (this is likely) am I off on some obtuse Monday Morning tangent? _{^{I need more coffee}}

A controls drawing can include HVAC, Electrical, hydronic, and whatever else is required, and is used to give an understanding to the programmer of the system, as well as communicate to any other stakeholder who needs to understand the system. There are correlated documents such as a 'Sequence of Operations", that the controls programmer will also conform to, in order to determine the correct operating parameters of the system.

Chris

Interesting. I spent a lot of years in the process control field, dealing with what we called Level 2 computers, DCS systems (Distributed Control Systems), and PLCs.

The coordination drawing that I knew about was always the one the other posters have talked about--a (set of) physical drawings of the facility showing physical locations of the various piping, raceways, (of different crafts).

I suspect this is what the OP is asking about.

more here.

chris

Chirs, this is not same as what you mention. But anyway, it is a good additional reference.

Hi! Hoping you be doing great with my reply :) Coordination drawing (called in Dubai) or composite drawing (in Qatar) is a drawing (auto cad) which has all the services on one drawing. Normally, we have seperate drawing for each services but in the above case all the services are shown on the same drawing. It is meant for better understanding of the site or realization of the site. Even, lighting and small power of the same project are shown on seperate drawings. Each subcontractor is given a copy of specification, BOQ, and related drawings (along with a set of coordination drawings). That would minimize the conflicts of conduits/pipes laying with other services (just to put up a senario or example).....

For drawings of lighting, fire alarm or power route...they can be done by a ME contractor. This is so-called shop drawing. These drawing could be one set of different drawings.

When we go into the process, e.g an chemical processing plant, there are variety of pipes put into one system. To recognize which pipe for process, which pipe for power or water... and to ensure that those pipes will not "touch" each other during installation. We have so-called coordination drawing (in Vietnam) where all the necessary things are displayed on the same drawing.

This drawing then will be submitted to owner for double checking. But it will not be done by the owner like in some of the poster comment. Depend how complex is the system, they will have different types of coordination.

I got the answer for this. It is maybe the general contractor, the designer, or the subcontractors...

An A&E firm is hired to create a set of drawings for a defined project. The firm should be coordinating between the different disiplines. The firm will usually pick the most important displine as the lead, based on the projects requirements. The contract will usually spell out the drawing requirements for that project. Part of the projects requirements would be if a "coordinating drawing" as a diverable. Most of the projects i have been associated will use a set of layouts for coordination of space allocation (not usually spelled out as a deliverable). The project might want to define a "coordinating drawing" as an allocation of materials/manpower/sequencing, which i have seen the projects department create such an item. I have been assigned to create a layout with notes for an installation sequence in a confined space. These are all based on a 2-D system. Underground work is the responcibility of the civil group. Above ground work can be the Architect/electrical/hvac/mechanical, depending on the major equipment of a particular project. A 3-D system will have files created within a defined space. These can be create separately or within the large model (have seen it done both ways). The overall model is your coordination drawing (an interference check can be run at any time). But, mostly all project designers on the project for the firm is reponsible for clearances. The checkers and responsible engineers will also review these requirements

The practacality of the field being able to recreate the design is not a reallity. Now this will create the as-built drawings based on the actual findings, change paper, interfaces, etc. The onsite contruction superintendent has the last say in accepting equipment (may/maynot match layouts), constructed equipment (in/out of tollerance or sequence). The as-built drawings need to be defined by the contract. Usually another firm than the A&E.

It all comes down to the company who is the owner of the facillity. They must decide who is going to control all the drawings/models. Will they be willing to pay for a "coordinating drawing". The project engineer can discuss the reality of the "cordinatiion drawing" and have it defined by the end user.

Also to note, i saw a million dollar project to be engineered with 3-D, just to make sure there would not be an interference when coordinating the installation of very large equipment in an existing facility. Only to find it would not fit, as the 3-D model showed, due to the lack of following up on as-built data. The owner of the facliity had not incorporated all as-built data. garbage in - garbage out.