Method of stress grading timber, and machine for stress grading

Details Method of stress grading timber, and machine for stress grading Method of stress grading timber, and machine for stress grading

1980-01-29

1981-09-15

Ciarlante, Anthony V.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73811, 73812, G01N 332

Patent

active

042890373

ABSTRACT:
The invention provides a method of stress grading timber, and a timber stress grading machine. The method and machine involve continuously moving a length of timber and stressing the moving length by applying a transverse load thereto. The length is supported by two supports between which the load is applied and the load causes a deflection of the timber length. The load and/or deflection are measured and the moving length is stressed differently by thereafter applying a different load to the timber length at the same position while supported in the same fashion to obtain a different deflection. The different load and/or deflection are measured and the original load and original deflection are related to the different load and different deflection according to predetermined criteria, thereby to grade the timber length. The machine provides means for carrying out the method.

REFERENCES:
patent: 3196672 (1965-07-01), Keller

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