| 摘要 |
PURPOSE:To facilitate construction by joining each main stem and each reinforcement main stem located at the top sections of semi-arch shaped truss structures with a pin by the use of an end section connecting stem, and thereby mounting tension members so that paired structures are mutually connected with a pin. CONSTITUTION:A form timbering is made up out of semi-arch shaped truss structures 3a and 3b, main stems 5, reinforcement main stems 10, end section connecting stems 12, main body sections 14, leg sections 15, pins 16 and 17, pin holes 18, a pin 24 and of tension stems 20. And the end sections of the main stem 5 and the reinforcement main stem 10 located at the top sections of the semi-arch shaped truss structure 3a and 3b are connected with each other so that said end sections are joined with end section connecting stem 13 provided with a joining pin hole for the main body section 14 having the leg section 15 located down below by means of the pins 16 and 17. In the second place, a tension member 20 which is freely telescopic in order to be adjusted is mounted between the main stem 5 and the leg section 15 of the connecting stem 13 so that the paired truss structures 3a and 3b are joined with a pin 24 through the pin hole 18 of the connecting stem 13. By this constitution, works can thereby be processed with ease. |
