The APD or the Detailed Preliminary Project

In terms of construction of institutional building or other social infrastructure, there are severalproceduresthat must bestrictlyfollowed. First, thereis the study phase whichalsoincludesseveral stages. Among the stages of the study phase is the development of the Preliminary Draft Document or APD. The drafting of the APD comesafter the validation of the APS or the Preliminary Draft Summary. It is in the APD that all stakeholders analyze the details of the criteriathatallowthem to deducewhether the projectisfeasible and profitable. So whatdoes a Detailed Pre-Project consistof ?

Whatis the definition of a Detailed Preliminary Project ?

A detailedpreliminaryproject or APD corresponds to one of the preliminary stages necessary for the realization of a new building or a rehabilitation of building or other. This is one of the project management tasksthat a client can delegate to an architect or project manager. The latter willalsobe able to monitor the execution of the works and theirprogressuntilcompletion and acceptance.

The APD follows a sketch studyfollowed by an APS (Preliminary Project Sketch) phase and can define the nature of the entire building construction project. The client has decided to continue operations on the basis of this DDS, in particular the feasibilitystudythatit has drawn up. The projectthen moves on to the general design phase, duringwhich the architects and engineers of the design office write the specifications for the technicalterms of the project, which are essential for the call for tenders.

Indeed, to conclude public or privatecontractswithvariousmanufacturers on each site, companiescollect Business Consultation Documents (DCE).

Thus, they can familiarizethemselveswithtechnicalregulations and labor standards. The objective of the APD isboth to determine the constructive elements of the workresultingfrom the technicalresearchcarried out upstream and to determine the intermediatefinancialperimeter. Thus, we can know whichtechnical solutions have been validated, the dimensions of the structure, the construction principles or the choice of materials. The detailedpreliminary design also sets the schedule (duration and schedule) for the execution of the works.

The composition of a building permit application, in particular a building permit application, generally uses the information collected in the APD.

Whatis the content of an APD ?

In general, the Detailed Preliminary Project document includes a concrete and precise summarizer of the various important elementsallowing to proceed to the realization of a project. In relation to this, a DetailedSummary Draft must containgraphic documents.

These are the detailed plans necessary for the constitution of the documents, as well as the execution plans (generaldiagrams, sections and facades) of the companywhichwillintervene as soon as the site opens. Thenthere are the written documents that must bepresented. These are the files whichmakeit possible to complete the understanding of the graphic part and to provide a global vision of the project.

It includes, amongotherthings, a costing of the provisional budget, a detailed surface table, a workschedule, and a descriptive note containing the regulations.

If we go into a little more detail, a Detailed Preliminary Project must containseveralelements, namely the graphicformalization of the proposeddetailed design in the form of plans, sections, elevations,

of the structure and itssurroundingsoutside the buildingscale of 1/100 (1cm/m) with certain details at 1/50 (2 cm/m), plans of structural principles and theirpredimensioning; single-line plots of networks and terminals on typical areas on a scale of 1/100 (heating, ventilation, plumbing, electricity, etc.),

the basic plots of external networks (1/100), the table of detailed surfaces and the detailed description of the construction principles of foundations and structures.

Theseelementsvarydepending on the project to becarried out and the list can beeven longer.

When an interior designer, architect, or draftsmancompletes a project, theyperformdifferenttasks. Thesetasks correspond to progression stages that are alwaysbuilt in the sameway over time.

The previouselementswere sketches, intentions, axes, ideas… but here, youhardly have to touchthemanymore.

Also, you must be consistent withyourallocated budget. This preliminarysummary article will let you know if you are in the right price range and even if you have improvedit.


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