প্রবাদ বাক্ক'

সিদ্ধান্তে আঁটল থাকুন ; নইলে ভেঙ্গে জাবেন ।

ইঞ্জিনিয়ার এম এ রাজ্জাক

চিন্তা করে কথা বলুন

কথা বলার আগে কিছুক্ষণ অপেক্ষা করে দ্রুত প্রয়োজনীয় কথাটুকু বলুন ।

আমার পরিকল্পানাঃ

cwiKíbv t Avwg mviv Rxeb gvby‡li †mevi Rb¨ gvby‡li Rxeb I wRexKvi Dbœqb wb‡q GKwU wd« †UªBwbs Bb&wówUDU cwiPvjbv KiwQ| fwel¨‡Z ag© I KvwiMix wel‡qi Dci GKwU wek¦we`¨vjq Pvjy Ki‡Z PvB|

AR©b t Avwg avbgwÛ, XvKvq GKwU jvB‡vªix, GKwU Kb&÷ªvK&kb& A¨vÛ& KbmvjwUs dvg© cwiPvjbv KiwQ Ges fMevbcyi, gvwbKM‡Ä GKwU eûg~Lx K…wl cÖKí i‡q‡Q|

আমার ক্রীত কর্ম ।

PvKzix K†iwQ t evsjv‡`k wegvb evwnbx, wewWAvi K‡jR Ges ivB‡dj&m cvewjK ¯‹zj GÛ K‡jR, wcjLvbv, XvKv| evsjv‡`k BDwbfvwm©wU, †gvnv¤§`cyi, XvKv| A¨v‡mU †Wfjc‡g›U GÛ †nvjwWsm wjwg‡UW, ‡Mvjkvb, XvKv| gybœy wmivwgK&m, avgivB, XvKv Ges iv¾vK Kb&mUªvK&kb& †Kv¤úvbx, avbgwÛ, XvKv, Zgv MÖæc, KvKivBj, XvKv|

লাভের জন্ন খুশি কারুন ; ঘুরিয়ে কথা বালুন ।

যার সাথেই কথা বল্বেন সব সময় মনে রাখতে হবে সে যেন খুশি থাকে । আসল উদ্দেশ জানতে দিবেন না । ইহাতে দুজনেরি লাভ হবে ।

মুখের প্রতিটি কথা পাহাড়ের মতো ওজন যা ভেঙ্গে পড়বে ।

প্রতিটি কথা জেনে, বুঝে, স্পষ্ট ভাবে বলতে হবে ।

ইঞ্জিনিয়ার এর এ রাজ্জাক

Some Relation

(1) AvqZ †ÿ‡Îi †LÎdj           = ‰`N©¨ x cÖ¯’|

(2) wÎfz‡Ri †ÿÎdj                = nvd x f~wgxD”PZv|

(3 )eM©‡ÿ‡Îi †ÿÎdj              = evû x evû|

(4) i¤^‡mi †ÿÎdj                  = ½ x KY© x KY©

(5) UªwcwRqv‡gi †ÿÎdj            = ½ x mgvšÍivj eûi       †hvMdj x Dnv‡`i j¤^`~iZ¡

(6) e„‡Ëi †ÿÎdj                   = πD²⁄4 = πr²

(7) AvqZvKvi  Nbe¯‘i AvqZb     =  ‰`N©¨ x cÖ¯’ x D”PZv

(8) wmwjÛv‡ii AvqZb              = πr²h

(9) †Kv‡Yi AvqZb                   = ¹⁄3 πr²h

(10) †Mvj‡Ki AqZb                =      ¾ πr³h

Methodology of a Steel Bridge

Erection method:

The variety of erection methods used for bridges is too wide to be covered in detail here.

The method selected depends very much on the type of bridge construction, span, height above ground or water etc.

Commonly used methods for the erection of bridges:

1. In-situ - assembly of bridge components on temporary false work.

2. Lifting - e.g. (a) beams and trusses - placing of individual beams or a complete deck by crane (b) suspension bridges - lifting of pre-fabricated deck modules which are then hung from the deck hangers connected to the previously installed main cables, slung between the main towers and anchorages.

Box girders lifted individually for a river bridge at St Nazaire, France

  

3. Launching - sequential construction (on rollers or tracks) of a continuous deck at one end of the bridge. As each new section is added the whole deck is pushed or pulled out (usually over multiple spans).

4. Sliding or rolling - construction of a complete new bridge (usually alongside a busy existing bridge) which is then jacked into place over a few hours or days, to replace the existing structure.

5. Cantilevering - (a) for arches - successive construction from the two springing points which is temporarily tied back until the two halves can be joined at midspan (b) for cable-stayed bridges - successive cantilevering out from the pylons of deck units suspended from the stay cables.

Unit of Goods

01.Brick                                   – Nos

02.Sand                                    – Cft

03.Port-land cement                 – Bag(50Kg)

04.Rod-Deformed bar              – Kg

05.PVC Coduit /Pipe               – Rft/Lbs/Kg

06.PVC And UPVC                 – Rft/Kg/PCS

07.CI, PVC, UPVC Fittings     – Nos/Pcs

08.G.I. Pipe                               - Rft/Pcs

09.G.I. Fittings                          – Nos/Pcs.

10.Pollythene                            – R0ll/Lbs

11.Chatt/Hessian cloth              – Roll/Yrd/Sft

12.Jute rope/Jute tape                – Kg/Roll

13.Door clamp                           – Kg/Pcs

14.Door frame                            – Cft/Rft/Nos

15.Bamboo                                 - Nos/Rft

16.Wood                                     – Cft

17.Electric cable/Wire     –Coil(Rft/Yrd/Meter)

18.Steel box                                – Nos

19.Safety net                                 – Sft/Kg

20 Tiles/Granete                         – Sft/Pcs

21.M.S. Sheet/C.I. Sheet            – Sft/Kg/Boundle

22.M.S. Angle/Flat bar               - Kg/Rft

23.Steel Shutter                           – Sft/Rft/Kg

24.Nut Bolt/Washer                    – Kg/Pcs.

25.Turn Bolt                                – Nos/Kg

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