Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 281
Fig. 852.—Section through Figs. 851 and 854. -Isometric View of Centre at Springing,showing Support Wedges, etc. the centre from the intrados by graduallyslackening the wedges. They also allow ofthe centre being taken down without undue … Centre for an Elliptical Arch. passage underneath. The joints used areshown by Figs. 845 to 848. Wedges areplaced in pairs directly between the top ofthe supports and the bottom of the centre,as shown by Fig. 846. In the first place, the vibration, which would be otherwise caused:Fig. 849 is the…
Carpentry · Joinery
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