ME3263 Tut QnsAns2015

ME3263 - DFATutorial Question with Answer

Assoc Prof SK Ong2015/2016 Semester 1

copyright@ONG_Soh_Khim2015 2

Bookshelf Assembly• A basic bookshelf from IKEA, it comes in a wide variety of

sizes and colors


Bookshelf Assembly• Step 1 : identify the parts, start

assembly• Parts

• 1 back panel• 2 side panels: 1 right side, 1

left side• 4 shelves: 1 bottom, 1 top, 2

middle• 8 metal stubs• 12 wooden plugs• 1 bottom front flashing• 4 nails • 8 screws• 8 round nuts

back panel

side panels

Top and bottom shelves

Middle shelves

Bottom front flashing


Bookshelf Assembly• Step 1 : Start the assembly• Insert 6 of the wood plugs into the side panel holes with your thumb. • 2 of the plugs are used for the bottom flashing, 2 for the bottom shelf, and

2 for the top shelf. Use the outer holes on the side panel as shown.

Wood plugS> 15T>2=180=0

HC: 00TH: 1.13s

HI: 31TI: 5s


Bookshelf Assembly• Step 1 : Start the

assembly• The 4 shelves are each

slightly different, you can tell them apart by looking at the bottom of them as shown in the photo.

• Top shelf has a groove• Middle shelves have no

holes, only 4 notches on the edges

• Bottom shelf is finished only on 1 side

Top shelf

Bottom shelf

Middle shelves


Bookshelf Assembly• Step 1: Start the

assemblyCarefully push the bottom flashing, bottom shelf, and top shelf onto the plugs in the side panel, as shown in the photo.

Right side panel

Top shelf

Bottom shelf

Bottom flashing=360HC: 91TH: 3sHI: 31TI: 5s

Bottom shelf=360HC: 91TH: 3sHI: 31TI: 5s

Topshelf=360HC: 91TH: 3sHI: 31TI: 5s


Bookshelf Assembly• Step 2 - second side panel• Push the remaining 6 wood plugs into the remaining side

panel.

Left side panelWood plugS> 15T>2=180=0

HC: 00TH: 1.13s

HI: 31TI: 5s


Bookshelf Assembly• Step 2 - second side

panel• Then carefully place

the side panel on top of the assembled parts, line up the 6 wood plugs, and push the second side panel onto the assembly.

Left side panel

Side panel=360HC: 91TH: 3s

HI: 51TI: 9s

Obstructed access and restricted vision


Bookshelf Assembly

Left side panel


Bookshelf Assembly• Step 3 - attach left side panel with screws• Fastening screws on the left side panel. • Use 4 screws, 4 round nuts, and the IKEA tool.• 1st, push a round nut into hole in top shelf. Make sure the slotted side is

showing and facing as shown in the photo.• 2nd, push a screw into the hole matching the round nut

Top shelf

Left panel

NutS> 15T>2=180=0

HC: 00TH: 1.13s

HI: 12TI: 5sObstructed access

Screw6S 15T>2=360=0

HC: 11TH: 1.8s

HI: 39TI: 8s

TA: 2.9s


Bookshelf Assembly• Step 3 - attach left side panel with screws• Fasten it in using the IKEA tool. • Tighten the screws but not too much, it can damage the wood.


Bookshelf Assembly• Step 3 - attach left side panel

with screws• The screws are designed to

be flushed with the wood surface.

• If you are embedding them far into the wood you are probably tightening too much.

• Repeat for the 3 other screws and nuts.

• Now the left side panel is fully attached.


Bookshelf Assembly• Step 4 - Fasten

together right side panel

• Carefully tip the assembly and put it face down.

Re-orientation

HI: 98TI: 9s


Bookshelf Assembly• Step 4 - Fasten together right side panel• Use the remaining 4 screws and nuts to attach the right side panel.

Bottom shelf

right panel

NutS> 15T>2=180=0

HC: 00TH: 1.13s

HI: 12TI: 5sObstructed access

Screw6S 15T>2=360=0

HC: 11TH: 1.8s

HI: 39TI: 8s

TA: 2.9s


Bookshelf Assembly• Step 5 - attach back

panel• The back panel slides

into grooves in the sides and top shelf.

• Orient it with the nice side facing down, and slide it into the grooves bottom to top as shown.

back panel

Back panel

=360 =360

HC: 91 TH: 3s

HI: 02 TI: 2.5s


Bookshelf Assembly• Step 5 - attach back panel• Make sure the back panel is all the way into the groove in the top shelf,

then use a hammer (not included in kit) to nail in 4 small nails. Nail=360 S> 15 HC: 15 IC: 31 TA: 2.9s=0 T> 2 TH: 2.25s TI: 5s


Bookshelf Assembly• Step 5 - attach back panel• The nails attach the back panel to the *bottom* shelf. • Make sure the back panel is pushed tight towards the top shelf while you

do the nailing, any looseness will make your shelving unit wobbly.


Bookshelf Assembly• Step 6 - place middle

shelves• Stand up the shelving

unit.

Re-orientation

HI: 98TI: 9s


Bookshelf Assembly• Step 6 - place middle shelves• The middle 2 shelves are not structural to the shelving unit.• Place the 8 metal studs into your choice of holes in the side panels.

Metal stubS> 15T>2=180=0

HC: 00TH: 1.13s

HI: 30TI: 2s


Bookshelf Assembly• Step 6 - place middle shelves• 4 studs hold up each of the

two middle shelves, and you can easily move them around to put the shelves at different heights.

• The middle shelves just rest on top of the studs, they are not attached in any way.

Middle shelf

1st middleshelf=360

HC: 91TH: 3s

HI: 30TI: 2s

2nd middleshelf=360

HC: 91TH: 3s

HI: 30TI: 2s


Bookshelf Analysis


Bookshelf Assembly - Analysis• Metal stubs, wooden plugs, nails, screws and nuts are time-

consuming operations• Two re-orientations of the sub-assembly when the bookshelf

is not fully secured.• Tools needed: IKEA tool, hammer.

ME3263 Tut QnsAns2015

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