LY/T 3221-2020Solid wood wall panel (English PDF)

4.1 Classification by side and end surface processing methods

--Ton-joint solid wood siding, as shown in diagram 1;

---Cut solid wood siding, as shown in diagram 2;

--Flat joint solid wood siding, as shown in Diagram 3.

Figure 1 Tenon-joined solid wood siding

Figure 2 Cut-out solid wood siding

Figure 3 Flush solid wood siding

4.2 Classification by base material

--- splicing solid wood siding, as shown in diagram 4;

--Unspliced solid wood siding, as shown in Diagram 5.

Figure 4 Splicing solid wood siding

Figure 5 Unspliced solid wood siding

4.3 Classification according to whether the surface is painted or not

-Finishing solid wood siding;

--Unpainted solid wood siding.

4.4 Classification by surface finish type

- Lacquered solid wood siding;

--Oil decorated solid wood siding.

5.1 Classification

Solid wood siding can be divided into superior product, first-class product and qualified product according to appearance quality and physical and chemical properties.

5.2 Specifications and deviations

5.2.1 Specifications and dimensions

5.2.1.1 The specifications and dimensions of solid wood siding shall meet the requirements of Table 1.

5.2.1.2 The size requirements of the base material unit of spliced solid wood siding;

Splice the solid wood siding base material unit, as shown in diagram 6;

5.2.1.3 Products of other sizes can be implemented according to the agreement between the supplier and the buyer.

5.2.1.4 According to the installation needs, the wall panels with the same width and thickness with a ratio area of not more than 5% and length less than the nominal size can be matched in the wall panels sold.

5.2.2 Dimensional deviation

5.2.2.1 The size deviation of solid wood siding shall meet the requirements of Table 3.

5.2.2.2 Length and width do not include the net length and net width of the tongue part.

5.2.3 Shape position deviation

The shape and position deviation should meet the requirements of Table 4.

5.3 Appearance quality

5.3.1 The appearance quality of solid wood siding of hardwood species should meet the requirements of Table 5.

Note 1.Any defect that cannot be clearly observed under the environmental conditions of appearance quality inspection is not obvious.

Note 2.The length of tongue lacking refers to the cumulative length of tongue lacking.

5.3.2 The appearance quality of solid wood siding of conifer species should meet the requirements of Table 6.

Note 1.Any defect that cannot be clearly observed under the environmental conditions of appearance quality inspection is not obvious.

Note 2.The length of tongue lacking refers to the cumulative length of tongue lacking.

5.3.3 The appearance quality requirements of solid wood siding can be implemented in accordance with the agreement between the supplier and the buyer.

5.4 Physical and chemical properties

5.4.1 The physical and chemical properties should meet the requirements of Table 7.

5.4.2 Refer to Appendix A for the average annual average moisture content of timber in various regions of my country.

5.4.3 The adhesion of the paint film on the surface of unpainted solid wood siding and oil-decorated solid wood siding is not required.

5.4.4 Non-spliced solid wood siding will not be tested for formaldehyde emission items, and the adhesives that are qualified (or designated by the purchaser) by the relevant inspection department the formaldehyde emission item inspection may not be carried out.

6.1 Inspection of specifications and deviations

6.1.1 Measuring tools

The requirements for measuring tools shall include but not limited to.

--Steel tape with an accuracy of 1mm;

--Steel ruler with an accuracy of 1mm;

--Vernier caliper with an accuracy of 0.02mm;

--Micrometer with an accuracy of 0.01mm;