Calculating Sufficiency Ratings

Pontis Pontis is a Bridge Management System (BMS) which incorporates dynamic, probabilistic models, and a detailed bridge database to predict maintenance and improvement needs, recommend optimal policies, and plan projects within budget and policy constraints. Its name derives from the Latin word for "bridge". can calculate the NBI See National Bridge Inventory. sufficiency ratings, Appraisal ratings (Structural, Deck Geometry and, Underclearance) and SD/FO status based on the standard items in the Pontis database.

  1. Prior to calculating sufficiency ratings, make sure that the NBI ratings upon which the sufficiency rating depends are up-to-date. You can use the NBI Translator button on the Condition task screen (or the Translate task on the Bridges tab) to calculate NBI ratings based on the element A fundamental part of a bridge for which condition is assessed and work is recommended. Elements are distinguished from Smart Flags by their condition distribution/extent within a structure and the ability to take corrective actions on them. condition ratings. See Calculating NBI Ratings from Element Conditions.

  2. If you are on the Inspection tab, you can calculate the sufficiency rating for the current structure "Structure" is the generic term used within Pontis to refer to a bridge, culvert or tunnel. by clicking on the Sufficiency Rating button on the Condition task screen. You can check the SR Up-to-date (recalc flag) item on the Inventory-Admin task to see if data affecting the sufficiency rating has changed since it was last calculated. This checkbox will be selected if the sufficiency rating needs to be recalculated.

  3. You can also calculate ratings for a group of structures from the Bridges tab. To do this, click on the Layout picklist, and select the layout called "Bridges with expired sufficiency ratings (xl_expired_suffrate)". This layout includes only those structures for which inspection or inventory has changed since the last time the sufficiency rating was calculated. You will normally want to select all of the structures on this list, using the Select All sub-task from the View List. If you prefer, you can select smaller groups of structures from the list by clicking on them.

  4. Click the Suff Rate task on the taskbar. The sufficiency ratings will be calculated for your selected structure(s), and the Sufficiency Rating Results screen will appear. This screen shows the previous values and the calculated values.

  5. To accept all of the calculated ratings and save them to the database, click on the Accept All button. To accept only some of the ratings, click an X into the Accept column, then click on the Accept button. This will save the selected ratings to the database. Ratings that are not accepted will be discarded, and the previously existing ratings will remain unchanged in the database. Click on the Cancel button to close the screen.