Measure, Mark, and Cut Lumber Accurately

A. Finished-Project Specification

Quantity: eleven finished pieces total — five individual control pieces (A–E), four matched F pieces, and two matched G pieces — each cut from straight 2×4 stock and inspected against the standards below.

B. Assessed Cut Schedule (Component Schedule)

Piece	Quantity	Material	Target Length	Preparation / Purpose
A	1	Straight 2×4	12 in.	Whole-inch reading and marking control
B	1	Straight 2×4	18 1/8 in.	Eighth-inch reading and marking control
C	1	Straight 2×4	23 5/8 in.	Mixed-fraction reading and marking control
D	1	Straight 2×4	9 7/16 in.	Sixteenth-inch reading and marking control
E	1	Straight 2×4	15 13/16 in.	Sixteenth-inch reading and marking control
F	4	Straight 2×4	16 3/8 in. each	Matched production set; one consistent reference and marking method
G	2	Straight 2×4	24 in. each	Paired full-length control pieces; compared directly to each other

C. Material Takeoff

• Stock: straight 2×4 dimensional lumber, sufficient length to yield Pieces A through G without piecing together offcuts, plus at least 20 percent additional stock for practice cuts and any required recuts.
• Fasteners and hardware: none; this project is measuring and cutting only.
• Consumables: one correct wood-cutting blade for the circular saw, inspected and installed per the manufacturer's instructions before Step 12.
• Waste allowance: the 20 percent stock allowance above covers expected recuts; do not purchase additional stock beyond this allowance without a documented reason recorded on the worksheet.

D. Acceptance Standards

Check	Standard
Individual piece length (A–E, F, G)	Within ±1/16 in. of target length
Cut square	Within 1/16 in. across the 3 1/2-in. face, checked with the combination square
Matched set F (4 pieces)	No two pieces differ from each other by more than 1/16 in.
Matched set G (2 pieces)	The two pieces differ from each other by no more than 1/16 in.
Cut-face condition	No uncontrolled tear-out, blade burn, split ends, or unsafe partial cut
Procedure	Saw inspection, support setup, cutting, and post-cut measurement completed independently

E. Preparation — Tape Reading, Stock Inspection, and Cut Planning

1. Complete the supplied tape-reading qualification before handling the saw. Correctly read and call out whole-inch, half-inch, quarter-inch, eighth-inch, and sixteenth-inch marks on the tape before proceeding to Step 2.
2. Inspect every board for defects. Check for embedded metal, splits, severe bow, crook, cup, twist, loose knots, rot, and contamination along the full length of each board.
3. Reject stock that cannot produce the required components safely and accurately. Set rejected boards aside and select replacement stock from the material allowance.
4. Sight each usable board and select one reference face, one reference edge, and one reference end. Sight down the length of the board to confirm the selected face and edge are the straightest available.
5. Mark the reference surfaces. Place a small "R" tick on the reference face, edge, and end so they remain identifiable after the first cut.
6. Review keeper side, waste side, kerf, long point, short point, and cumulative-error control. Confirm you can identify each on the board before marking any cut line.
7. Prepare a cut plan for each board. Sequence the cuts so that, except where the cut plan specifically requires it, no piece is measured from a previously cut end.

F. Layout and Verification Procedure (Repeat for Pieces A–E)

1. Hook the tape on the reference end and mark the target length with a fine tick. Read the tape to the nearest 1/16 in. and mark the tick precisely at that reading.
2. Seat the speed square against the reference edge and draw a thin 90-degree line through the tick. Hold the square firmly against the reference edge while drawing.
3. Mark the waste side with a clear X and identify the intended saw-blade side of the line. Confirm the X falls on the offcut side, not the keeper side.
4. Verify the layout line with the combination square before cutting. Confirm the line reads square to the reference edge along its full length.

G. Circular Saw Setup and Crosscut Procedure (Repeat for Each Piece)

1. Disconnect power or remove the battery and inspect the saw. Check the blade, arbor, lower guard, base plate, cord or battery, and trigger for damage or malfunction before every use.
2. Set the blade depth according to the saw manufacturer's instructions. Only the portion of the blade required to cut through the 2×4 should project below the base plate.
3. Support the keeper piece securely and arrange the offcut so the kerf can open without pinching the blade. Position the cutting supports on both sides of the layout line.
4. Clamp the stock where clamping does not interfere with the saw base or blade path. Confirm the clamp will not contact the saw during the cut.
5. Position the saw base fully on the supported side and align the blade teeth on the waste side of the line. Confirm alignment before starting the saw.
6. Start the saw clear of the material and allow it to reach full speed. Do not contact the stock until the blade is at full speed.
7. Advance steadily without twisting or forcing the saw and keep the base plate flat. Maintain a steady feed rate through the full length of the cut.
8. Release the trigger after the blade clears the stock and allow the blade to stop before setting the saw down. Do not set the saw down while the blade is still spinning.
9. Measure the finished piece and check the cut face with the combination square. Record the actual length and square condition immediately.
10. Record target length, actual length, dimensional difference, and square condition on the cut inspection worksheet.

H. Matched Production Sets (Pieces F and G)

1. Prepare the four matched F pieces using one consistent reference and repeatable marking method. Use the same reference end, edge, and marking sequence from Section F and G above for all four pieces.
2. Prepare the two matched G pieces using the same method. Compare the two G pieces directly against each other in addition to checking each against the 24-in. target.
3. Identify the longest and shortest piece in each matched set. Record both and calculate the difference between them.

I. Recut and Closeout Procedure

1. Recut every failed component. Classify each failure as reading, marking, reference loss, kerf placement, support, blade condition, or saw-control error before recutting.
2. Label and retain passing pieces. Store them for use as measurement references or as Project 04 practice stock per that chapter's material list.