
uttar 21 veen sadak pull

washington key tacoma mein uttar 21 veen sadak pull 1910 mein banaaya gayaa thaa. ise engineer wadell aind harrington dwara design kiya gayaa thaa aur yeh ack nirantar thhos kathor-frame girder pull haye. yeh apane prakaar key sabse shuruati udaharanon mein seey ack key roop mein mahatvapurna haye. ise noxville, tenacy mein sharan maarg jalmarg key saath "lagbhag ack saath" banaaya gayaa thaa, jise carle doubleu dwara pralekhit kiya gayaa thaa. condit pahala nirantar concreet girder pull banaaya jaanaa haye.
isamen chaar nirantar girder key saath teen prabalit concreet key spain hain. isake vistaar prabalit concreet stambhon aur nikatvarti kshetron dwara samarthit hain. pull mein "badey paimaane parr aur adhik design kiye gaye" slab (gahare) aur chaude seey, gahare seey beam hain. yeh beach mein trolley track koo samaayojit karane key liye chauda haye.
iss pull koo 1982 mein aitihaasik sthaanon key rashtriya register mein soochibaddh kiya gayaa thaa.

