A floor on bearers
Lay three bearers on the ground, 1200 long, 50 wide and 75 high, 275 apart. Then nine floor boards across them, 600 long, 120 wide and 28 thick, 15 apart so the air gets under the logs.
Do it here
The model is on the left, the steps on the right. Do each step in the model: it ticks itself when it's done. Then press Check my work.
Follows the model you're drawing: each step ticks itself once it's done.
Press Set up the model.
You should see: A patch of garden with a wall behind it, and a dashed outline on the ground, 1200 × 600: the log store stands here.
RectangleR Click the dashed corner at the front left. Move right and away from you, and type
1200,50Enter. Push/PullP Click the rectangle, pull it up and type75Enter. SelectSpace Triple-click it, press G and name it Bearer.You should see: A bearer along the front of the outline, 75 high.
MoveM With the bearer selected, tap Ctrl (Option on a Mac) to copy. Click its bottom corner at the front on the left, move away from you, press ← to lock it to the green axis and type
275Enter. Then typex2Enter.You should see: Three bearers: at the front, in the middle and at the back.
RectangleR Click the top corner of the front bearer on the left. Move right and away from you, and type
120,600Enter. Push/PullP Click the rectangle, pull it up and type28Enter. SelectSpace Triple-click it, press G and name it Floor board.You should see: A board from the front to the back, across all three bearers.
MoveM With the board selected, tap Ctrl (Option on a Mac) to copy. Click its corner at the front on the left, move right, press → to lock it to the red axis and type
135Enter. Then typex8Enter.You should see: Nine floor boards, 135 apart: 120 for a board and a gap of 15.
Press Check my work.
You should see: 12 of 12 right.
Keys and axes
Tools
- RRectangle
- PPush/Pull
- LLine
- MMove
- QRotate
- SpaceSelect
- GMake Component (select the board first)
Axes: an arrow key locks the way you're drawing or moving
- →red axisleft and right: the width
- ←green axisfront and back: the depth
- ↑blue axisup and down: the height
- ShiftAlready moving along an axis? Hold Shift and it stays on it.
- CtrlWith Move: makes a copy (Option on a Mac)
- EscCancels what you're doing
Sizes: just type, they go in the Measurements box at the bottom right, then Enter. Two sizes: 1000,600 (1000;600 if your computer writes decimals with a comma).
On a tablet or phone: press Full screen, tap to click, drag one finger to move the pointer while you draw (or to turn the view), pinch with two fingers to zoom, and type sizes on the keypad under the model (its red, green and blue keys lock an axis, as the arrow keys do). A mouse and keyboard is quicker.
Where it goes
The boards
Every size in millimetres. Bearers 50 × 75, floor boards 120 × 28, sides and roof from 18 mm exterior plywood, slats 100 × 22.
Bearer, front
1200 × 75 × 501200 long, 50 wide, 75 high.
On the ground, along the front.
Bearer, middle
1200 × 75 × 501200 long, 50 wide, 75 high.
On the ground, 275 back from the front.
Bearer, back
1200 × 75 × 501200 long, 50 wide, 75 high.
On the ground, along the back: 550 back from the front.
Floor board, 1st
600 × 120 × 28600 long, 120 wide, 28 thick.
On the bearers, from the front to the back, at the left end.
Floor board, 2nd
600 × 120 × 28600 long, 120 wide, 28 thick.
On the bearers, from the front to the back, 135 from the left end.
Floor board, 3rd
600 × 120 × 28600 long, 120 wide, 28 thick.
On the bearers, from the front to the back, 270 from the left end.
Floor board, 4th
600 × 120 × 28600 long, 120 wide, 28 thick.
On the bearers, from the front to the back, 405 from the left end.
Floor board, 5th
600 × 120 × 28600 long, 120 wide, 28 thick.
On the bearers, from the front to the back, 540 from the left end.
Floor board, 6th
600 × 120 × 28600 long, 120 wide, 28 thick.
On the bearers, from the front to the back, 675 from the left end.
Floor board, 7th
600 × 120 × 28600 long, 120 wide, 28 thick.
On the bearers, from the front to the back, 810 from the left end.
Floor board, 8th
600 × 120 × 28600 long, 120 wide, 28 thick.
On the bearers, from the front to the back, 945 from the left end.
Floor board, 9th
600 × 120 × 28600 long, 120 wide, 28 thick.
On the bearers, from the front to the back, 1080 from the left end.
Stuck?Show a hint
Nine boards of 120 and eight gaps of 15 fill the 1200 exactly: 9 × 120 + 8 × 15 = 1200. The gaps and the bearers keep the logs off the wet ground, with air all round them, so they dry.
What Check my work looks at
- Every board's size, to 1 mm
- Where each board is, to 1 mm
- Which way each board is turned
- That each board is its own component
- That nothing is left loose