TIMBER BRIDGE CONSTRUCTION IN N.S.W. Ix. 
3 blocks on the wales not being satisfactory, the blocks shrinking 
q away from the struts, resulting in a slackness in the bracing. 
At Glennies Creek, near Singleton, the superstructure of one 
of the 90 feet spans cost, erected in position, £450, whilst in the 
: ag bridge a pier of the design above described 28 feet 4 inches 
F high from bottom waling to capwales, driven about 16 feet to 
4 tock, cost £200. The timber for this bridge was brought from 
: pepe Hawke to Newcastle by sea 61 miles, thence forward by 
. to Singleton 49 miles, thence by road 9 miles, or a total 
‘ carriage of 119 miles. _ 
& Late in the year 1892, it was decided to erect a new bridge 
over the Murrumbidgee River at Wagga Wagga. Designs were 
; pmitted for a light iron lattice girder bridge, carrying @ timber 
deck resting on iron croés girders, but the amount available being 
: insufficient, the author’s design for a timber truss bridge was 
: decided upon, and a contract for construction let to Mr. 8. Stokes 
on 4th October, 1893, at shedule rates, totalling £12,604. 
aring completion, and, reckoned by 
by far the largest 
a short description 
trusses, 
forming 
e: As this bridge is now ne 
. floor space per span (3,165 square feet) is 
4 timber structure yet attempted in the Colony, 
aa be of interest :—The bridge consists of six timber 
 Yesting on iron cylinder piers and concrete abutments, 
” centres, also nine approach spans each 
and 
three spans each of 110’ 3 
of 35 feet. The trusses stand 27’ 1” apart, centre to centre, 
“are connected by a top and bottom system of lateral bracing, 
4 angle and portal brackets being introduced in the top system. 
; Each truss contains seven panels of 15’ 9° and being 21 feet deep 
between centres of triangulations enables full provision to be 
- Mnade for a loaded wool waggon, which requires 17’ 6” head room. 
: The truss spans are designed to carry 4 distributed live load of 
1-2 tons per foot run, or a concentrated load of 16 tons. 
‘The carriageway is 24’ 4” whilst one 4 6” footway is arranged 
_ for, so that the requirements of the wool traffic will be fully met; 
_ ® wool waggon measuring 11’ 6” when loaded and 6’ 6” when 
empty. 
ey i eterna ge tae 
PRN ee ghee ia td rere. 
a VES ey ee oe 
