# Dietrich's Item Number Catalog — Rules & Reference Sheet ### What the list is The catalog is Dietrich's standardized numeric classification for every structural component (known internally as *Stab-Nummern* / *Bauteil-Nummern* — beam type numbers). Each component created in the software carries a specific item number that identifies its functional role in the structure. As stated in the ABC Guide §26, "Each part is created with a specific Item number and carries its information further on into lists, plans and machine files." > **Source:** *Dietrichs\_ABC\_EN\_03\_2021\_RZ §26 — HRB Wall Guideline Editor and Construction* *** ### Rule 1 — The number itself is hierarchical and meaningful The numbering follows a **hundreds / tens / ones** pattern: * **Hundreds digit = Functional zone** (100 Rafter, 200 Hip/Valley, 300 Plate, 400 Tie, 500 Floor Joist, 600 Wall Member, 700 Truss, 800 Batten/Sheathing, 900 General) * **Tens digit = Subfamily within the zone** (e.g. within 600: 610 Verticals, 620 Horizontals, 630 Struts, 640 Beams/Lintels/Sills, 650 Log-home, 660 Blocking, 670 Stiffeners) * **Ones digit = Specific component role** (e.g. within 610: 611 Post, 612 Stud, 613 Corner Post, 614 Door Post, 616 Window Post) The group number (e.g. 610) functions as a *filter target*; the leaf number (e.g. 612) is what an individual part receives. > **Usage in filters:** Postprocessor group specifications accept lists or ranges of these numbers — e.g. `3/4/6/-2/-3` for individual groups, or `-2..3` for a range. **Source:** *Postprozessor Guide §1.5.8 — Group dependent functions* *** ### Rule 2 — Assignment is automatic, driven by construction context Users rarely type item numbers directly. They are assigned by the module that creates the part, based on *where* and *how* the part is placed: * **D-CAD manual entry** — the beam function you pick carries the item number into the part * **Automatic construction** (HRB Wall Guidelines, Roof, Floor Deck automatisms) — the guideline/ruleset assigns the number based on the component's role in the generated assembly * **Profiles** — profiles instantiate components with item numbers defined in the profile template * **Logic Blocks & SmartTags** — read existing item numbers and apply operations conditionally The HRB Wall Guideline Editor is the primary rule source for wall components: it defines the components and their properties in a construction guideline, and assigns the appropriate item numbers when walls are generated. > **Source:** *Dietrichs\_ABC\_EN\_03\_2021\_RZ §30 — HRB Wall Guideline Editor* *** ### Rule 3 — The same piece gets a different number depending on role Item number reflects **structural role, not geometry or material**. Identical lumber receives different numbers based on context: | Physical piece | Role in structure | Item number | | ----------------------------------- | --------------------------- | -------------------------------------- | | Horizontal member at bottom of wall | Permanent bottom plate | **621** Bottom Plate (*Schwelle*) | | Same piece | Temporary construction sill | **623** Sole Plate (*Montageschwelle*) | | Rafter geometry | Normal roof rafter | **111** Common Rafter | | Same geometry, flying past wall | Structural overhang | **112** Overhang Rafter | | Same geometry, decorative only | Non-structural | **113** Blind Rafter | | Beam between posts | Mid-wall horizontal | **641** Wall Beam | | Same beam, above opening | Structural lintel | **642** Lintel | | Same beam, below opening | Sill under window | **643** Sill | *** ### Rule 4 — Chamfered / tilted variants get their own numbers Where cut geometry changes significantly, Dietrich's assigns a distinct number so downstream CNC and list logic can branch: * **131 / 132 / 133** — Tilted Slanting Rafters, distinguished by chamfering * **315 / 316 / 318** — Chamfered plate variants (*abgegratete Pfetten*) * **331 / 332 / 333** — Rising Purlins, split by chamfering treatment This matters for BTLx/BVX export and postprocessor branching. *** ### Rule 5 — Item numbers are the primary filter key across the whole system Virtually every Dietrich's subsystem uses item numbers as its hook: **Postprocessor rules** — Material-dependent and group-dependent functions target item numbers or ranges to control nailing rows, restricted areas, and drilling behavior. The `Beam without nailing` function, for example, completely excludes a beam with a specified item number from nailing. > **Source:** *Postprozessor Guide §1.5.8 — Group dependent functions* **Sorting — beam-type-dependent sorting numbers (V19.01+)** — Reserve sequence-number ranges per item number group. Purlins can be forced to sort within 100–140 while rafters, hips, valleys, and ties start at 141 or higher. Syntax: `from/to` entries such as `320-323` (all canted non-rising purlins) or `331-331` (rising purlins only). > **Source:** *V19.01 Update §3.7.2 — Bar type dependent running numbers* **SmartTags** — Conditional operations applied based on item number and other component properties. > **Source:** *Dietrichs\_ABC\_EN\_03\_2021\_RZ §65 — SmartTags* **Sorting Number function** — The general Sort function; depending on beam type, sequence number ranges and specific fixed numbers can be assigned. > **Source:** *Dietrichs\_ABC\_EN\_03\_2021\_RZ §67 — Sorting Number* **D-Load (Load Planning)** — "Component types from 'Individual components' group" filter uses item numbers to control which parts load as individual components vs. as part of elements. > **Source:** *Loading Planning Guide §5.6 — Individual parts* **Wall Guidelines variables (V22.01+)** — Wall-layer item numbers are exposed as variables `LInp0`, `LInm1`, …(partner walls: `A_LInp0`, `A_LInm1`, …) for use in conditions like *"If slice item number contains OSB, then…"* — letting sheathing behavior be controlled directly via item number. > **Source:** *V22.01 Update §3.13 — Wall guidelines* **Connection-type filters** — Connection types in the wall guideline editor filter single objects by item type, beam type, designation, and groups. > **Source:** *V22.01 Update §3.13 — Wall guidelines (connection types)* *** ### Rule 6 — Replacement Item Numbers are a *separate mechanism* Do not confuse the structural item numbers in your catalog with **Replacement Item Numbers** introduced in V19.01. Replacement item numbers let a material-level item number (e.g. `OSB`) be automatically refined at sort time to a dimensioned variant (`OSB/3 22mm`) based on the component's actual thickness. * The original item number is preserved in square brackets in object info: `"OSB/3 22mm [OSB]"` * Replacement happens during sorting, not at creation * Filters in intersection sets, Type4 edits, and SmartTags still reference the **original** item numbers, not the replacement > **Source:** *V19.01 Update §3.7.4 — Sorting: Replacement ID numbers* *** ### Rule 7 — The 900-series is the escape hatch The 900-range exists for parts that don't fit any functional schema: * **900** General Beams (non-specific) * **950 / 960 / 970** Vertical / Horizontal / Diagonal general members * **951 / 961 / 971** Generic Post / Beam / Brace These carry no semantic information and will be invisible to most rule-based automation. Use sparingly — they bypass guideline rules, postprocessor group filters, and D-Load grouping. *** ### Rule 8 — Module-specific number reservations | Number range | Module / Context | | -------------- | --------------------------------------------------------------------------------------------------------------- | | **180–182** | Support Truss Timbers (*Widerlagerhölzer*) | | **650–652** | Log Home Construction — only generated by Log Building functions | | **800-series** | Battens, Sheathing, Panels — driven by roof covering and wall layer definitions | | **830–843** | Sheathing and Thermal Insulation subfamilies | | **850–862** | Sheet materials (incl. CLT 853, Plaster Base 854, Function Panels 860–862) | | **920–922** | Function Objects — logical placeholders (Load Room 921, Substitute Representation 922), **not** real components | | **990–991** | Armature / Tension Ties — hardware, assigned by the hardware library | > **Source:** *Dietrichs\_ABC\_EN\_03\_2021\_RZ §26 — Floor Decks, §30 — HRB*; *Loading Planning Guide §6.3.1 — Representation of loading components* *** ### Reference documents (project knowledge) | Citation used above | Full filename | | ------------------------------------- | --------------------------------------------------------- | | ABC Guide §§26, 30, 65, 67 | `Dietrichs_ABC_EN_03_2021_RZ_ind_-_Wil_Dancey.epub` | | V19.01 §§3.7.1, 3.7.2, 3.7.4 | `Microsoft_Word_-_V_19_Update_de_-_Wil_Dancey.epub` | | V22.01 §§3.13, connection types | `V22_01_Update_description_-_Lindner_Johann_Baptist.epub` | | Postprozessor §§1.5.8, 1.5.9 | `Microsoft_Word_-_Postprozessor_-_Wil_Dancey.epub` | | Load Planning §§5.6, 6.3.1 | `Loading__Planning_1_20_FSt_SAp5.pdf` | | General Help 2025 (general reference) | `General_Help_2025_.docx` | *** --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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