Douglas Fir Bridge, Dinkey Creek, Cal.

Dinkey Creek Bridge, built of structural Douglas Fir, Teco Ring Connectors, Span, 90 ft. roadway width, 20 ft. specifications, A.A.S.H.O., loading H 15 material, 38,9000 f.b.m. select structural grade Douglas fir 992 split ring timber connectors 5120 lbs. other hardware and steel. Engineering features: all joints lapped for greater stiffness and ease of framing heel joint tension splice takes advantage of minimum splice stress and puts bearing on end grain instead of side grain stresses in joints transmitted through modern split ring timber connectors permits use of timber tension members, makes costly metal parts unnecessary method of floor beam suspension and use of timber tension members reduces effects of shrinkage which requires repeated maintenance arched form of top chord produces more uniform stress in chords, reduces stresses in web members and simplifies connections prototype bridge completely pre-fabricated before shipment to bridge site design by West Coast Lumberman's Association, 364 Stuart Bldg., Seattle, Wash.