Building Diagram Number: Difference between revisions

From Equinox Wiki
← Older editNewer edit →
VisualWikitext
No edit summary
No edit summary
Line 1: Line 1:
{{draft}}
{{draft}}


==== 2. Building Diagrams ====
==== 1. Purpose of Building Diagram Numbers ====
 
* '''Foundation Identification''': Used to classify a building’s foundation type for documentation and floodplain management purposes.
* '''Historical Relevance''': Previously essential for flood insurance rating but still vital for understanding elevation and flood risk.
 
----
 
==== 2. Building Diagram Numbers and Descriptions ====


===== Diagram 1A: Slab-on-Grade Without Fill =====
===== Diagram 1A: Slab-on-Grade Without Fill =====


* '''Key Feature''': Bottom floor at or above ground level on at least one side.
* '''Key Features''':
* '''Lowest Floor for Rating''': Top of slab or lowest garage floor if applicable.
** Bottom floor directly on the ground, no additional fill used.
** Often seen in non-coastal, flat areas.
* '''Example Uses''': Standard residential construction in low-risk areas.


===== Diagram 1B: Slab-on-Grade With Fill =====
===== Diagram 1B: Slab-on-Grade With Fill =====


* '''Key Feature''': Raised slab with fill at or above ground level.
* '''Key Features''':
* '''Lowest Floor for Rating''': Same as Diagram 1A.
** Bottom floor elevated with fill but at ground level on one side.
** Used to reduce flood exposure.
* '''Example Uses''': Homes in areas with minor flood risks.


===== Diagram 2A: Full Basement =====
===== Diagram 2A: Full Basement =====


* '''Key Feature''': Floor below ground level (subgrade) on all sides.
* '''Key Features''':
* '''Lowest Floor for Rating''': Top of basement floor.
** Fully below ground level (subgrade) on all sides.
 
** High flood exposure due to water intrusion risks.
===== Diagram 2B: Subterranean Basement =====
* '''Example Uses''': Common in older residential structures in flood zones.
 
* '''Key Feature''': Fully underground with limited access points.
* '''Lowest Floor for Rating''': Top of basement floor.


===== Diagram 3: Split-Level Slab-on-Grade =====
===== Diagram 3: Split-Level Slab-on-Grade =====


* '''Key Feature''': Multiple levels at or above ground on one side.
* '''Key Features''':
* '''Lowest Floor for Rating''': Top of slab.
** Multi-level design with no part below grade.
** Lower levels directly on the ground.
* '''Example Uses''': Residential homes with uneven interior levels.


===== Diagram 4: Split-Level Basement =====
===== Diagram 4: Split-Level Basement =====


* '''Key Feature''': Partial subgrade floor below ground level.
* '''Key Features''':
* '''Lowest Floor for Rating''': Basement slab.
** One portion of the structure includes a subgrade basement.
** Other levels are at or above ground.
* '''Example Uses''': Homes built on sloped lots.


===== Diagram 5: Elevated on Piers or Posts (Open) =====
===== Diagram 5: Elevated on Piers or Posts (Open) =====


* '''Key Feature''': No obstructions below elevated floor.
* '''Key Features''':
* '''Lowest Floor for Rating''': Lowest elevated floor.
** Elevated structure on piers, posts, or pilings with no enclosed area underneath.
** Designed for high flood zones or coastal regions.
* '''Example Uses''': Beach houses or properties in velocity flood zones.


===== Diagram 6: Elevated on Piers or Posts (Enclosed) =====
===== Diagram 6: Elevated on Piers or Posts (Enclosed) =====


* '''Key Feature''': Fully or partially enclosed area below elevated floor.
* '''Key Features''':
* '''Lowest Floor for Rating''': Lowest elevated floor or enclosure floor, depending on conditions.
** Elevated on piers with a partially or fully enclosed area below.
** Requires proper venting to equalize hydrostatic pressure.
* '''Example Uses''': Homes in coastal or flood-prone inland areas.


===== Diagram 7: Elevated with Walkout Basement =====
===== Diagram 7: Elevated with Walkout Basement =====


* '''Key Feature''': Basement partially below grade with ground sloping away.
* '''Key Features''':
* '''Lowest Floor for Rating''': Elevated floor above the walkout basement.
** Basement partially below grade on some sides, with direct outdoor access via a fully above-grade wall.
** The ground slopes away from the building.
* '''Example Uses''': Structures on hilly terrain.


===== Diagram 8: Non-Elevated with Attached Garage =====
===== Diagram 8: Non-Elevated with Attached Garage =====


* '''Key Feature''': Non-elevated floor with garage included.
* '''Key Features''':
* '''Lowest Floor for Rating''': Floor of the attached garage or lowest enclosed area.
** Ground-level structure with a garage attached that could be below the main floor.
** Susceptible to flooding in garage and adjacent spaces.
* '''Example Uses''': Suburban homes with drive-under garages.
 
----
 
==== 3. Why Diagram Numbers Still Matter ====
 
* '''Foundation Typing''': Essential for documenting and communicating a building’s structural setup.
* '''Floodplain Management''': Helps identify mitigation needs like elevation, venting, or floodproofing.
* '''Policy Documentation''': Useful for underwriters and agents when verifying compliance with NFIP requirements.




{{nfip}}
{{nfip}}

Revision as of 15:31, 3 December 2024

This page is a rough draft and will need more work before it's finalized.

1. Purpose of Building Diagram Numbers

  • Foundation Identification: Used to classify a building’s foundation type for documentation and floodplain management purposes.
  • Historical Relevance: Previously essential for flood insurance rating but still vital for understanding elevation and flood risk.

2. Building Diagram Numbers and Descriptions

Diagram 1A: Slab-on-Grade Without Fill
  • Key Features:
    • Bottom floor directly on the ground, no additional fill used.
    • Often seen in non-coastal, flat areas.
  • Example Uses: Standard residential construction in low-risk areas.
Diagram 1B: Slab-on-Grade With Fill
  • Key Features:
    • Bottom floor elevated with fill but at ground level on one side.
    • Used to reduce flood exposure.
  • Example Uses: Homes in areas with minor flood risks.
Diagram 2A: Full Basement
  • Key Features:
    • Fully below ground level (subgrade) on all sides.
    • High flood exposure due to water intrusion risks.
  • Example Uses: Common in older residential structures in flood zones.
Diagram 3: Split-Level Slab-on-Grade
  • Key Features:
    • Multi-level design with no part below grade.
    • Lower levels directly on the ground.
  • Example Uses: Residential homes with uneven interior levels.
Diagram 4: Split-Level Basement
  • Key Features:
    • One portion of the structure includes a subgrade basement.
    • Other levels are at or above ground.
  • Example Uses: Homes built on sloped lots.
Diagram 5: Elevated on Piers or Posts (Open)
  • Key Features:
    • Elevated structure on piers, posts, or pilings with no enclosed area underneath.
    • Designed for high flood zones or coastal regions.
  • Example Uses: Beach houses or properties in velocity flood zones.
Diagram 6: Elevated on Piers or Posts (Enclosed)
  • Key Features:
    • Elevated on piers with a partially or fully enclosed area below.
    • Requires proper venting to equalize hydrostatic pressure.
  • Example Uses: Homes in coastal or flood-prone inland areas.
Diagram 7: Elevated with Walkout Basement
  • Key Features:
    • Basement partially below grade on some sides, with direct outdoor access via a fully above-grade wall.
    • The ground slopes away from the building.
  • Example Uses: Structures on hilly terrain.
Diagram 8: Non-Elevated with Attached Garage
  • Key Features:
    • Ground-level structure with a garage attached that could be below the main floor.
    • Susceptible to flooding in garage and adjacent spaces.
  • Example Uses: Suburban homes with drive-under garages.

3. Why Diagram Numbers Still Matter

  • Foundation Typing: Essential for documenting and communicating a building’s structural setup.
  • Floodplain Management: Helps identify mitigation needs like elevation, venting, or floodproofing.
  • Policy Documentation: Useful for underwriters and agents when verifying compliance with NFIP requirements.

This page contains information about the NFIP. Find more NFIP Resources.

Retrieved from "http://stage-help.equinox.insure/mediawiki/index.php?title=Building_Diagram_Number&oldid=4091"