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Takwa Engineerin & Consultant, Jessore (2026)

02/06/2020

-টাইমলাইনে রেখে দিন কাজে আসবে
Important Shortcut Keys for Computer-

CTRL+A. . . . . . . . . . . . . . . . . Select All
CTRL+C. . . . . . . . . . . . . . . . . Copy
CTRL+X. . . . . . . . . . . . . . . . . Cut
CTRL+V. . . . . . . . . . . . . . . . . Paste
CTRL+Z. . . . . . . . . . . . . . . . . Undo
CTRL+B. . . . . . . . . . . . . . . . . Bold
CTRL+U. . . . . . . . . . . . . . . . . Underline
CTRL+I . . . . . . . . . . . . . . . . . Italic
F1 . . . . . . . . . . . . . . . . . . . . . . Help
F2 . . . . . . . . . . . . . . . . . . . . . Rename selected object
F3 . . . . . . . . . . . . . . . . . . . . . Find all files
F4 . . . . . . . . . . . . . . . . . . . . . Opens file list drop-down in dialogs
F5 . . . . . . . . . . . . . . . . . . . . . Refresh current window
F6 . . . . . . . . . . . . . . . . . . . . . Shifts focus in Windows Explorer
F10 . . . . . . . . . . . . . . . . . . . . Activates menu bar options
ALT+TAB . . . . . . . . . . . . . . . . Cycles between open applications
ALT+F4 . . . . . . . . . . . . . . . . . Quit program, close current window
ALT+F6 . . . . . . . . . . . . . . . . . Switch between current program windows
ALT+ENTER. . . . . . . . . . . . . . Opens properties dialog
ALT+SPACE . . . . . . . . . . . . . . System menu for current window
ALT+¢ . . . . . . . . . . . . . . . . . . opens drop-down lists in dialog boxes
BACKSPACE . . . . . . . . . . . . . Switch to parent folder
CTRL+ESC . . . . . . . . . . . . . . Opens Start menu
CTRL+ALT+DEL . . . . . . . . . . Opens task manager, reboots the computer
CTRL+TAB . . . . . . . . . . . . . . Move through property tabs
CTRL+SHIFT+DRAG . . . . . . . Create shortcut (also right-click, drag)
CTRL+DRAG . . . . . . . . . . . . . Copy File
ESC . . . . . . . . . . . . . . . . . . . Cancel last function
SHIFT . . . . . . . . . . . . . . . . . . Press/hold SHIFT, insert CD-ROM to bypass auto-play
SHIFT+DRAG . . . . . . . . . . . . Move file
SHIFT+F10. . . . . . . . . . . . . . . Opens context menu (same as right-click)
SHIFT+DELETE . . . . . . . . . . . Full wipe delete (bypasses Recycle Bin)
ALT+underlined letter . . . . Opens the corresponding menu
PC Keyboard Shortcuts
Document Cursor Controls
HOME . . . . . . . . . . . . . . to beginning of line or far left of field or screen
END . . . . . . . . . . . . . . . . to end of line, or far right of field or screen
CTRL+HOME . . . . . . . . to the top
CTRL+END . . . . . . . . . . to the bottom
PAGE UP . . . . . . . . . . . . moves document or dialog box up one page
PAGE DOWN . . . . . . . . moves document or dialog down one page
ARROW KEYS . . . . . . . move focus in documents, dialogs, etc.
CTRL+ > . . . . . . . . . . . . next word
CTRL+SHIFT+ > . . . . . . selects word
Windows Explorer Tree Control
Numeric Keypad * . . . Expand all under current selection
Numeric Keypad + . . . Expands current selection
Numeric Keypad – . . . Collapses current selection
¦ . . . . . . . . . . . . . . . . . . Expand current selection or go to first child
‰ . . . . . . . . . . . . . . . . . . Collapse current selection or go to parent
Special Characters
‘ Opening single quote . . . alt 0145
’ Closing single quote . . . . alt 0146
“ Opening double quote . . . alt 0147
“ Closing double quote. . . . alt 0148
– En dash. . . . . . . . . . . . . . . alt 0150
— Em dash . . . . . . . . . . . . . . alt 0151
… Ellipsis. . . . . . . . . . . . . . . . alt 0133
• Bullet . . . . . . . . . . . . . . . . alt 0149
® Registration Mark . . . . . . . alt 0174
© Copyright . . . . . . . . . . . . . alt 0169
™ Trademark . . . . . . . . . . . . alt 0153
° Degree symbol. . . . . . . . . alt 0176
¢ Cent sign . . . . . . . . . . . . . alt 0162
1⁄4 . . . . . . . . . . . . . . . . . . . . . alt 0188
1⁄2 . . . . . . . . . . . . . . . . . . . . . alt 0189
3⁄4 . . . . . . . . . . . . . . . . . . . . . alt 0190
PC Keyboard Shortcuts
Creating unique images in a uniform world! Creating unique images in a uniform world!
é . . . . . . . . . . . . . . . alt 0233
É . . . . . . . . . . . . . . . alt 0201
ñ . . . . . . . . . . . . . . . alt 0241
÷ . . . . . . . . . . . . . . . alt 0247
File menu options in current program
Alt + E Edit options in current program
F1 Universal help (for all programs)
Ctrl + A Select all text
Ctrl + X Cut selected item
Shift + Del Cut selected item
Ctrl + C Copy selected item
Ctrl + Ins Copy selected item
Ctrl + V Paste
Shift + Ins Paste
Home Go to beginning of current line
Ctrl + Home Go to beginning of document
End Go to end of current line
Ctrl + End Go to end of document
Shift + Home Highlight from current position to beginning of line
Shift + End Highlight from current position to end of line
Ctrl + f Move one word to the left at a time
Ctrl + g Move one word to the right at a time
MICROSOFT® WINDOWS® SHORTCUT KEYS
Alt + Tab Switch between open applications
Alt +
Shift + Tab
Switch backwards between open
applications
Alt + Print
Screen
Create screen shot for current program
Ctrl + Alt + Del Reboot/Windows® task manager
Ctrl + Esc Bring up start menu
Alt + Esc Switch between applications on taskbar
F2 Rename selected icon
F3 Start find from desktop
F4 Open the drive selection when browsing
F5 Refresh contents
Alt + F4 Close current open program
Ctrl + F4 Close window in program
Ctrl + Plus
Key
Automatically adjust widths of all columns
in Windows Explorer
Alt + Enter Open properties window of selected icon
or program
Shift + F10 Simulate right-click on selected item
Shift + Del Delete programs/files permanently
Holding Shift
During Bootup
Boot safe mode or bypass system files
Holding Shift
During Bootup
When putting in an audio CD, will prevent
CD Player from playing
WINKEY SHORTCUTS
WINKEY + D Bring desktop to the top of other windows
WINKEY + M Minimize all windows
WINKEY +
SHIFT + M
Undo the minimize done by WINKEY + M
and WINKEY + D
WINKEY + E Open Microsoft Explorer
WINKEY + Tab Cycle through open programs on taskbar
WINKEY + F Display the Windows® Search/Find feature
WINKEY +
CTRL + F
Display the search for computers window
WINKEY + F1 Display the Microsoft® Windows® help
WINKEY + R Open the run window
WINKEY +
Pause /Break
Open the system properties window
WINKEY + U Open utility manager
WINKEY + L Lock the computer (Windows XP® & later)
OUTLOOK® SHORTCUT KEYS
Alt + S Send the email
Ctrl + C Copy selected text
Ctrl + X Cut selected text
Ctrl + P Open print dialog box
Ctrl + K Complete name/email typed in address bar
Ctrl + B Bold highlighted selection
Ctrl + I Italicize highlighted selection
Ctrl + U Underline highlighted selection
Ctrl + R Reply to an email
Ctrl + F Forward an email
Ctrl + N Create a new email
Ctrl + Shift + A Create a new appointment to your calendar
Ctrl + Shift + O Open the outbox
Ctrl + Shift + I Open the inbox
Ctrl + Shift + K Add a new task
Ctrl + Shift + C Create a new contact
Ctrl + Shift+ J Create a new journal entry
WORD® SHORTCUT KEYS
Ctrl + A Select all contents of the page
Ctrl + B Bold highlighted selection
Ctrl + C Copy selected text
Ctrl + X Cut selected text
Ctrl + N Open new/blank document
Ctrl + O Open options
Ctrl + P Open the print window
Ctrl + F Open find box
Ctrl + I Italicize highlighted selection
Ctrl + K Insert link
Ctrl + U Underline highlighted selection
Ctrl + V Paste
Ctrl + Y Redo the last action performed
Ctrl + Z Undo last action
Ctrl + G Find and replace options
Ctrl + H Find and replace options
Ctrl + J Justify paragraph alignment
Ctrl + L Align selected text or line to the left
Ctrl + Q Align selected paragraph to the left
Ctrl + E Align selected

20/09/2019

02/02/2019

নতুন ইঞ্জিনিয়ার সাহেবরা নিচের লেখাটা সুন্দর করে কপি করে রেখে পৃথিবির যেখানেই যাও নাকেনো এটাই তোমার কাজে লাগবে।পুরো প্রাকটিক্যাল কাজের গাইড বুক হিসাবে কাজে লাগবে→
Useful information
CONCRETE GRADE:
M5 = 1:4:8
M10= 1:3:6
M15= 1:2:4
M20= 1:1.5:3
M25= 1:1:2
CLEAR COVER TO MAIN REINFORCEMENT:
1.FOOTINGS : 50 mm
2.RAFT FOUNDATION.TOP : 50 mm
3.RAFT FOUNDATION.BOTTOM/SIDES : 75 mm
4.STRAP BEAM : 50 mm
5.GRADE SLAB : 20 mm
6.COLUMN : 40 mm
7.SHEAR WALL : 25 mm
8.BEAMS : 25 mm
9.SLABS : 15 mm
10.FLAT SLAB : 20 mm
11.STAIRCASE : 15 mm
12.RET. WALL : 20/ 25 mm on earth
13.WATER RETAINING STRUCTURES : 20/30 mm
WEIGHT OF ROD PER METER LENGTH:
DIA WEIGHT PER METER
6mm = 0.222Kg
8mm = 0.395 Kg
10mm = 0.616 Kg
12mm = 0.888 Kg
16mm = 1.578 Kg
20mm = 2.466 Kg
25mm = 3.853 Kg
32mm = 6.313 Kg
40mm = 9.865 Kg
1bag cement-50kg
1feet-0.3048m
1m-3.28ft
1sq.m-10.76sq.f ¬t
1cu.m-35.28cu.f ¬t
1acre-43560sq.f ¬t
1cent-435.6sq.f ¬t
1hectare-2.47ac ¬re
1acre-100cent-4 ¬046.724sq.m
1ground-2400sq. ¬ft
1unit-100cu.ft- ¬2.83cu.m 1square-100sq.f ¬t
1 M LENGTH STEEL ROD I ITS VOLUME
V=(Pi/4)*Dia x DiaX L=(3.14/4)x D x D X 1 (for
1m length) Density of Steel=7850 kg/ cub meter
Weight = Volume x Density=(3.14/4)x D x D X
1x7850 (if D is in mm ) So = ((3.14/4)x D x D X
1x7850)/(1000x1000) = Dodd/162.27
DESIGN MIX:
M10 ( 1 : 3.92 : 5.62)
Cement : 210 Kg/ M 3
20 mm Jelly : 708 Kg/ M 3
12.5 mm Jelly : 472 Kg/ M 3
River sand : 823 Kg/ M 3
Total water : 185 Kg/ M 3
Fresh concrete density: 2398 Kg/M 3
M20 ( 1 : 2.48 : 3.55)
Cement : 320 Kg/ M 3
20 mm Jelly : 683 Kg/ M 3
12.5 mm Jelly : 455 Kg/ M 3
River sand : 794 Kg/ M 3
Total water : 176 Kg/ M 3
Admixture : 0.7%
Fresh concrete density: 2430 Kg/ M 3
M25 ( 1 : 2.28 : 3.27)
Cement : 340 Kg/ M 3
20 mm Jelly : 667 Kg/ M 3
12.5 mm Jelly : 445 Kg/ M 3
River sand : 775 Kg/ M 3
Total water : 185 Kg/ M 3
Admixture : 0.6%
Fresh concrete density: 2414 Kg/ M 3
Note: sand 775 + 2% moisture, Water185 -20.5 =
164 Liters,
Admixture = 0.5% is 100ml
M30 ( 1 : 2 : 2.87)
Cement : 380 Kg/ M 3
20 mm Jelly : 654 Kg/ M 3
12.5 mm Jelly : 436 Kg/ M 3
River sand : 760 Kg/ M 3
Total water : 187 Kg/ M 3
Admixture : 0.7%
Fresh concrete density: 2420 Kg/ M 3
Note: Sand = 760 Kg with 2% moisture
(170.80+15.20)
M35 ( 1 : 1.79 : 2.57)
Cement : 410 Kg/ M 3
20 mm Jelly : 632 Kg/ M 3
12.5 mm Jelly : 421 Kg/ M 3
River sand : 735 Kg/ M 3
Total water : 200 Kg/ M 3
Admixture : 0.7%
Fresh concrete density: 2400 Kg/ M 3
Note: sand = 735 + 2%, Water = 200- 14.7 =
185.30,
Admixture = 0.7%
M40 ( 1 : 1.67 : 2.39)
Cement : 430 Kg/ M 3
20 mm Jelly : 618 Kg/ M 3
12.5 mm Jelly : 412 Kg/ M 3
River sand : 718 Kg/ M 3
Water Cement ratio : 0.43
Admixture : 0.7%
Note: Sand = 718 + Bulk age 1%
M45 ( 1 : 1.58 : 2.26)
Cement : 450 Kg/ M 3
20 mm Jelly : 626 Kg/ M 3
12.5 mm Jelly : 417 Kg/ M 3
River sand : 727 Kg/ M 3 + Bulk age 1%
Water Cement ratio : 0.43
Admixture : 0.7%
M50 ( 1 : 1.44 : 2.23)
Cement : 450 Kg/ M 3
20 mm Jelly : 590 Kg/ M 3
12.5 mm Jelly : 483 Kg/ M 3
River sand : 689 Kg/ M 3 + Bulk age 12%
Water Cement ratio : 0.36 (188 Kg)
Admixture : 1.20%3
Micro silica : 30 Kg
Super flow 6.7% of cement
1 cubic meter contains 500 bricks
The Standard size of the 1st class brick is
190mm
x 90mm x
90mm and motor joint should be 10mm thick
So brick with motor=200 x 100 x 100.
Volume of 1st class brick = 0.19 x 0.09 X 0.09 =
0.001539
cu.m
Volume of 1st class brick with motor =0.2 x 0.1 x0.1=0.002 cu.m
No. on bricks per 1cu.m= 1/volume of1st class
brick with
motor
=1/0.002
= 500 no’s of bricks
STANDARD CONVERSION FACTORS
INCH = 25.4 MILLIMETRE
FOOT = 0.3048 METRE
YARD = 0.9144 METRE
MILE = 1.6093 KILOMETER
ACRE = 0.4047 HECTARE
POUND = 0.4536 KILOGRAM
MILLIMETRE= 0.0394 INCH
METRE = 3.2808FOOT
METRE = 1.0936YARD
A rope having length 100cm.You can form any
shape using this rope (Example: Triangle,
Rectangle, etc.,). Which shape will covers
maximum area
1 Newton = o.101971 kg
1 mm2 = 0.01 cm2
1 cm2 = 100 mm2
1 mm2 = 20 N
100 mm2 = 2000N
1 cm2 = 2000N
2000 N = 203.942 kg
So 20 N/ mm2 = 203.942 kg / cm2
RATIO IS 1:1.5:3