grading_lumber

**Construction Technology**

 * CABINET UNIT -** **(TCJ2O)**

include component="page" page="toolbar_cabinet_units" editable="1" Pg 9 1a. Explain how softwood is graded. Ans- 2a. How are timbers graded? Ans – 2b. For what type of construction are they used? Ans - 3a. List two used of shop lumber? Ans – 4. Explain how hardwood is graded? Ans- 5. Explain what the following symbols indicate: Dressed lumber = QUAR = RGH = KD = S2S = 8/4 = 6. List 4 lumber defects and state the cause of each. Knots – Checks or splits – Pitch pockets – Wet rot – Dry rot – Worm holes – 8. Why is plywood stronger than ordinary wood? Ans – 10a. List two uses of plywood. Ans – 10b. Why can bracing be omitted when framing a house with plywood? Ans –
 * Unit 2: Grading Lumber**

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