While estimating a
door identify each opening in line with the items in the schedule and other
relevant data on the architectural drawings. In the specifications all the
information regarding installation must be assessed carefully.
While making a quantity survey for doors, merge all similar types and frames and keep an eye so that nothing can be missed. To simplify the task just count the total number of openings.
Consider material, size, gauge, finish, core material, style, fire rating label, doors made of plastic & wood etc for making estimation of a door.
For any particular building also take into consideration pre-hung doors and windows alongwith additional items like pre-hung units, locksets and interior casings etc.
Put down space for casings, stops, grounds, and hardware in the tabulation on the Quantity Sheet
There are several types of specialty doors that can be utilized in the modern buildings. These types of door are sliding glass doors, overhead garage doors, and bulkhead doors. These should also be included in quantity sheet
Scrutinize the plans and specifications briefly to ensure that all hardware, operating mechanisms, fire ratings, finishes, and any special installation requirements are also included.
While executing quantity estimation give special consideration to fire doors and consider the appropriate temperature riser for a fire door. In this case you can get help from architect or local building inspector
Pay particular attention to fire doors when performing the quantity takeoff. At the time of calculating quantities, take in any glass (usually wired) or special inserts to be installed in fire doors (or in any doors).
