--- title: Understanding Dividers and Glazing Bars description: "The Timber Cutting List editor has six loops which use similar logic:   Frame divider (full and partial) refers to any part added to the frame via the Transom / Mullion button. Sash divider (full and" --- [Skip to content](https://knowledgehub.endtoendit.com/knowledgebase/full-and-partial-dividers-and-glazing-bars#main-content) [![integrate knowledge base](https://knowledgehub.endtoendit.com/hs-fs/hubfs/integrate%20knowledge%20base.jpg?width=386&height=34&name=integrate%20knowledge%20base.jpg)](https://knowledgehub.endtoendit.com/knowledgebase?hsLang=en) Open main navigation Close main navigation - [endtoendit.com](https://endtoendit.com/) [endtoendit.com](https://endtoendit.com/) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [integrate Support Team Knowledge Base](https://knowledgehub.endtoendit.com/knowledgebase?hsLang=en) 2. [integratePRO Module](https://knowledgehub.endtoendit.com/knowledgebase/integratepro-module?hsLang=en) 3. [Setup and Configuration](https://knowledgehub.endtoendit.com/knowledgebase/integratepro-module?hsLang=en#setup-and-configuration) # Understanding Dividers and Glazing Bars ## Explore how and when rules trigger for different types of dividers and glazing bars. ### **Key Points: Understanding Dividers and Glazing Bars** **1. The timber cutting list editor** The timber cutting list editor has six loops - frame dividers, sash dividers and glazing bars use similar logic: **Frame dividers** - Frame divider, partial frame divider Frame divider, full or partial refers to any part added to the **frame** via the **transom/mullion** button. **Sash dividers** - Sash divider, partial sash divider Sash divider, full or partial, refers to any part added to the**sash**via the **transom/mullion** button, such as, door muntins. **Glazing bars** - Glazing bar, partial glazing bar Glazing bar, full or partial, refers to any part added to the **glazing** via the **glazingbar** button. ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Apr-30-2025-10-28-20-1689-AM.png?width=271&height=141&name=image-png-Apr-30-2025-10-28-20-1689-AM.png) **2. Full vs partial loops** The **difference** between **full** and **partial** loops is not whether the rule will trigger for a particular divider, but: **How many times** the rule will trigger **What values** it will calculate for its **visible\_length\_in\_mm** variable (**sightline\_length\_in\_mm** for glazing bars) With no other conditions in place, **transoms** and **mullions** will always trigger rules on the **frame divider** and **partial frame divider** loops, regardless of transom length. **3. Example - Simple design** A simple design will **trigger identically** on **frame divider** and **partial frame divider** loops. ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Apr-30-2025-10-39-26-1028-AM.png?width=670&height=655&name=image-png-Apr-30-2025-10-39-26-1028-AM.png) ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Apr-30-2025-12-50-17-7605-PM.png?width=670&height=218&name=image-png-Apr-30-2025-12-50-17-7605-PM.png) **4. Example - When one divider intersects another** The loops **behave differently** when one divider intersects another: **Frame divider loop** - Considers the full length of each transom and mullion The rule triggers **twice** because the **transom from jamb to jamb** and the **mullion from frame head to cill** are both considered as a single divider. **Partial frame divider** **loop -** Considers the length up to the intersection The rule triggers **four** times because the loop registers **two mullions** divided by a transom and **two transoms** divided by a mullion. ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Apr-30-2025-12-52-06-6963-PM.png?width=670&height=614&name=image-png-Apr-30-2025-12-52-06-6963-PM.png)   ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Apr-30-2025-12-52-33-7345-PM.png?width=670&height=490&name=image-png-Apr-30-2025-12-52-33-7345-PM.png)   ***Note:** When writing timber cutting list rules for transoms and mullions, put mullion rules on the frame divider loop, and transom rules on the partial frame divider loop. For the given example above, this would trigger as a single full-length mullion intersecting two separate transoms.* **5. is\_partial variable** The **is\_partial** variable available on **full** and **partial** loops checks whether the **divider** is the full length of the frame/sash/glazing. It will only **trigger** if the **divider stops** when it reaches another divider, instead of continuing to the other end. The given example below has a partial transom. ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Apr-30-2025-01-06-41-7144-PM.png?width=670&height=540&name=image-png-Apr-30-2025-01-06-41-7144-PM.png) If the condition below is added to the rules, they will only trigger for the **partial transom**, regardless of loop. ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Apr-30-2025-01-07-40-5486-PM.png?width=670&height=226&name=image-png-Apr-30-2025-01-07-40-5486-PM.png)   - [integrateCRM Module](https://knowledgehub.endtoendit.com/knowledgebase/integratecrm-module?hsLang=en#main-content) - [Leads & Prospects](https://knowledgehub.endtoendit.com/knowledgebase/integratecrm-module?hsLang=en#leads-prospects) - [Emails & Templates](https://knowledgehub.endtoendit.com/knowledgebase/integratecrm-module?hsLang=en#emails-templates) - [Tasks, Appointments & Reminders](https://knowledgehub.endtoendit.com/knowledgebase/integratecrm-module?hsLang=en#tasks-appointments-reminders) - 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