DREVO Heritage Timber Standard (DHTS)pivot table system

DREVO Heritage Timber Standard (DHTS) pivot table system

1. General architecture of DHTS

Level	Code / system	What determines	When assigned	May change
Identification	DHTS-ID	The unique identity of wood	Upon registration	No
Purpose	LHT / WT / HT / RT	What is wood preserved for?	After environmental assessment	Yes
Original quality	TQ-A–D	Quality of wood before storage	Before the reserve	Usually no, it is kept as a historical indicator
Horizon	RH	Planned reserve period	Before bookmarking	Yes
Storage method	AIR / WAT / WET / SED / CAP / CTF / LAB	Environment and conservation technology	Before bookmarking	Yes
Site class	SS-A–D	Reliability of storage location	When certifying a site	Yes
Research	RS	Scientific status	When creating an experiment	Yes
Actual age of the reserve	SUN	Real storage time	Automatically	It's increasing
Post-reserve state	PS	Condition after extraction	After Recovery	Yes
Final material	HMG	Actual quality of stabilized material	After the tests	Yes
Final certification	DHTC	Verified Heritage Material	After stabilization	New version upon re-evaluation

2. Timber designation statuses

Code	Name	Main function	Extraction	A typical example
LHT	Living Habitat Timber	Preservation of the ecosystem	Usually no	Driftwood, tree-habitat
WT	Working Timber	Current generation usage	Yes	Construction timber
HT	Heritage Timber	Intergenerational reserve	According to the established rules	Valuable oak RH-100
RT	Research Timber	Research	According to the experiment schedule	Control sample
HT-RT	Heritage + Research	Reserve and research at the same time	Limited	Twin Log Series
NSR	Never Sell Reserve	Non-profit heritage	Special solution only	A historically unique trunk
PRR	Permanent Research Reserve	Permanent scientific control	Not planned	Reference series

3. Initial quality class TQ

Class	Level	Wood character	Main application
TQ-A	Exceptional	Rare, large, historical, of outstanding quality	Heritage, museum, architecture, science foundation
TQ-B	High	High-quality large timber	Strategic reserve
TQ-C	Worker	Good wood without exceptional characteristics	Production and medium-term reserve
TQ-D	Experimental	New breeds, defects, unknown behavior	Research

Key rule:TQ-A does not automatically mean RH-300, and TQ-D does not mean bad wood.These are different dimensions of the system.

4. Reserve Horizon

Code	Planned horizon	The main task
RH-10	≈10 years	Primary research
RH-25	≈25 years	Next generation reserve
RH-50	≈50 years	Medium-Term Strategic Fund
RH-100	≈100 years	Intergenerational reserve
RH-200	≈200 years	Historical Foundation
RH-300	≈300 years	Tree Heritage
RH-P	Indefinitely	Permanent Heritage / Research Reserve

In this case, the actual time is designated separately asRA — Reserve Age.

For example:

RH-200 / RA-73

means: the planned horizon is 200 years, but in fact the timber is in reserve for 73 years.

5. Storage technologies

Code	System	Wednesday	The main goal	Suitable directions
AIR	DREVO Air Reserve	Stable air	Natural exposure	Structural, furniture, and musical wood
WHAT	Water Reserve	Water	Fully saturated storage	Oak, experimental series
WET	Wetland Reserve	Swamp / floodplain	Long-term low-oxygen environment	Heritage and Research
BUT	Sediment Reserve	Bottom sediments	Isolation from oxygen	Stained wood
CAP	Timber Capsule	Sealed/membrane cover	Controlled microenvironment	Experiments
CTF	Controlled Timber Formation	Controlled solution	Formation of properties	Research parties
LAB	Laboratory Reserve	Laboratory environment	Accurate comparative studies	TQ-D / RT
HUB	Hybrid Reserve	Several environments	Sequential processing	Special programs

6. Storage Site Class

Class	Purpose	Typical horizon	Requirements
SS-A	Strategic area	100–300+ years	Maximum hydrological, legal and ecological stability
SS-B	Long-term plot	50–100 years	High stability, controlled risks
SS-C	Medium term	20–50 years	Regular monitoring and availability
SS-D	Experimental	1–20 years	Quick retrieval and the ability to change conditions

SS Summary Score

Criterion	Approximate weight
Hydrological stability	20%
Risk of timber loss	15%
Water quality	15%
Environmental safety	10%
Oxygen regime	10%
Bottom stability	10%
Legal security	10%
Availability	5%
Anti-theft protection	5%

7. Research statuses

Code	Meaning	Purpose
RS-C	Control	Control sample
RS-N	Natural	Natural storage
RS-E	Experimental	Experimental technology
RS-TL	Twin Log	Comparative parts of the same/similar trunk
RS-LT	Long-Term	Long-term scientific series
RS-MIN	Mineral	Mineral environment
RS-HUM	Humic	Humic environment
RS-SED	Sediment	Experiment with bottom sediments
RS-MIC	Microbiology	Microbiological series

8. DHTS-ID and object coding

Primary immutable ID

DHT-[SPECIES]-[YEAR]-[COUNTRY]-[SERIAL]

Example:

DHT-QROB-2032-CH-000124

Element	Meaning
DHT	WOOD Heritage Timber
RELATIVE	Oak tree
2032	Year of registration
CH	Switzerland
000124	Unique number

Complete classification

DHT-QROB-2032-CH-000124 / HT / TQ-A / RH-200 / WET-SED / SS-A / RS-LT / PS-N

9. Object life cycle

Stage	Main action	Document / status
1	Tree detection	Candidate Record
2	Environmental assessment	LHT / WT / HT / RT
3	Diagnostics	Pre-Reserve Report
4	ID assignment	DHTS-ID
5	Classification	TQ
6	Selecting a horizon	RH
7	Selecting a technology	Storage Code
8	Site selection	SS
9	Bookmark	REC
10	Storage	SUN
11	Monitoring	MORE
12	Extraction decision	Exit Decision
13	Rise	RXC
14	Wet movement	PS-W
15	Stabilization	PS-S1 / PS-S2
16	Conditioning	PS-C
17	Trials	Laboratory Report
18	Material class	HMG
19	Certificate	DHTC
20	Recycling	Product IDs
21	Product	Product Heritage Record

10. DHTS documents

Code	Document	When is it created?
City	Timber Passport	Upon registration
PER	Pre-Reserve Examination Report	Before bookmarking
REC	Reserve Entry Certificate	After placement
MORE	Monitoring Event Record	At each inspection
RDR	Reserve Decision Record	Decision to continue/extract
RXC	Reserve Exit Certificate	When extracting
PSR	Post-Reserve Stabilization Record	During stabilization
LTR	Laboratory Testing Report	After stabilization
DHTC	DREVO Heritage Timber Certificate	After certification
PHR	Product Heritage Record	After the product is manufactured
ABOUT	Physical Archive Record	For long-term archiving

11. Post-reserve statuses PS

Code	State
PS-N	Not retrieved
PS-W	Extracted, remains water-saturated
PS-S1	Primary stabilization
PS-S2	Controlled drying
PS-C	Air conditioned
PS-CERT	Fully certified
PS-R	Research use only

The correct sequence for water storage is:

PS-N → PS-W → PS-S1 → PS-S2 → PS-C → PS-CERT

12. Heritage Material Grade Final Class

Code	Class	Example of application
HMG-1	Exceptional Heritage	National objects, unique art, rare items
HMG-2	Premium Heritage	Furniture, interior, musical instruments
HMG-3	Architectural Heritage	Architecture and structures after calculation verification
HMG-R	Research	Research
HMG-C	Conservation	Museum/archaeological wood

A very important rule:

TQ-A ≠ HMG-1 automatically.

TQ describes woodto meals, HMG - her real stateafter storage and stabilization.

13. Complete diagnostics by class

Study	TQ-A	TQ-B	TQ-C	TQ-D
Photographic documentation	✓	✓	✓	✓
Dimensions	✓	✓	✓	✓
Humidity	✓	✓	✓	✓
Metal detection	✓	✓	✓	✓
3D scanning	✓	desirable	optional	according to the program
Ultrasound	✓	✓	selectively	according to the program
Tomography	✓ for large	selectively	—	research
Density	✓	✓	desirable	✓
Dendrochronology	✓	desirable	selectively	if necessary
Chemical analysis	✓	by risk	by risk	according to the program
Genetic sample	✓ for significant	selectively	—	research
Control samples	✓	✓	party	mandatory

14. Checkpoints

Series	CONTROL
T0	Before bookmarking
T1	1 year
T5	5 years
T10	10 years
T25	25 years old
T50	50 years
T100	100 years
T150	150 years
T200	200 years
T300	300 years

The main trunks do not need to be extracted at each stage; control samples are created for this purpose.

15. Sample system

Code	Material
S-COR	Core / керн
S-END	End sample
S-SAP	Sapwood
S-HRT	Heartwood
S-BRK	Bark
S-DRY	Dry control
S-WAT	Water control
S-SED	Bottom control
S-DNA	Genetic sample
S-MIC	Microscopic specimen

Example:

DHT-QROB-2032-CH-000124-S-HRT-05

16. Criteria for transition between stages

Transition	Basic conditions
Candidate → HT	Ecological acceptability + value of wood
HT → Reserve	Passport + TQ + RH + SS + method
SS-D → SS-C/B/A	Confirmed site stability
RH-50 → RH-100	Well preserved + scientifically proven
Storage → Recovery	Term, necessity or risk of loss
PS-W → PS-S1	Diagnostics completed
PS-S1 → PS-S2	The material is stable to reduce moisture
PS-S2 → PS-C	Geometry and humidity are stabilized
PS-C → PS-CERT	Successful tests
TQ-A → HMG-1	Based on actual results only

17. Main reasons for early extraction

Cause	Solution
Falling water levels	Transfer or Recovery
Increased oxygen	Risk analysis
Pollution	Urgent examination
Destruction of wood	Early extraction
Moving the barrel	Re-fixation
Destruction of the tank	Transfer
Environmental conflict	The ecosystem takes priority
Loss of legal protection	Transfer/new agreement
Loss of identity	Quarantine and restoration of provenance
Of particular cultural importance	Commission decision

18. DHTS Prohibitions

Prohibited action	Cause
Cutting down healthy old trees exclusively for reserve purposes	Conflict with environmental goals
Using valuable natural wetlands as a storage area	Risk of ecosystem destruction
The laying of toxically contaminated wood	Environmental pollution
Removal of ecologically important large timber without assessment	Habitat loss
Deleting passport history	Loss of traceability
Replacement of Controlled Timber with naturally stained timber	Unreliable origin
Selling NSR without a special solution	Violation of heritage status
Storing a unique collection in one place	Catastrophic systemic risk
Extraction without a stabilization plan	Risk of destroying the material
Recognizing age as a guarantee of quality	Age ≠ preservation

19. Hierarchy of Value

Level	What is saved
1	Ecosystem
2	Living tree
3	Genetic line
4	Historical information
5	Physical trunk
6	Scientific data
7	Material
8	Economic value

This is an important philosophy of DHTS:The market value of timber is not the first priority.

20. Final summary card of one object

Field	Example
DHTS-ID	DHT-QROB-2032-CH-000124
Purpose	HT-RT
Breed	Oak tree
Original class	TQ-A
Meal plan	RH-200
Actual age	RA-73
Method	WET-SED
Playground	SS-A
Study	RS-LT
Post-reserve status	PS-N
Final HMG	Not yet assigned
Special status	NSR
Digital passport	Active
Next inspection	According to the program
Future appointment	Heritage / Research

DREVO Heritage Timber Standard (DHTS)pivot table system