Company small-medium system by Web

I need to code a system that is alredy desinged, and will be used by Web by a company. The system will be mostly about reception of the factory, not a full-company-system. However it is not a small job. More than 40 web pages will be needed. There are many that are very similar to each other and easy to make. But there will be others that will be more complex. All the structure of the system and tables in database has already been made and the coder that take this job will not have to work on its design. The document that describes the job to be done is quite detailed, as you can see if you take a look at it. What must be done by the coder is: 1. HTML design 2. PHP code.