几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 - 查看单个帖子 - prestressing timber structural members with cables

prestressing timber structural members with cables
i'm working on a project which requires the use of pretensioned cables attached to wooden girders. does anyone have any recommendations on how to anchor these cables, or how to (inexpensively) pull the wires to tension them. to give an idea of the scale of the project, 12 foot girders made of several 2 x 10's must carry a cable tension of about 4500 lbs. any advice would be much appreciated.
turnbuckles?
turnbuckles will work with the scale of your project. you will likely lose a good amount of pretension to creep in the wood, you may want to plan a periodic check of the cable tension. what do others think, is checking the torque on the turn buckle a reliable enough method to check the rod tension (assuming you are well below yield, say .25fy)? this question has come up around my office.
turnbuckles...sounds like a broken record.
riggers often use a cable tensioner - like a turn buckle but it is specifically designed to pre-tension cables - hold them while clamping w/o losing tension. they use them on tall towers, antennaes, etc.
any good cable supplier should be able to help

2009-09-15, 02:44 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	prestressing timber structural members with cables prestressing timber structural members with cables i'm working on a project which requires the use of pretensioned cables attached to wooden girders. does anyone have any recommendations on how to anchor these cables, or how to (inexpensively) pull the wires to tension them. to give an idea of the scale of the project, 12 foot girders made of several 2 x 10's must carry a cable tension of about 4500 lbs. any advice would be much appreciated. turnbuckles? turnbuckles will work with the scale of your project. you will likely lose a good amount of pretension to creep in the wood, you may want to plan a periodic check of the cable tension. what do others think, is checking the torque on the turn buckle a reliable enough method to check the rod tension (assuming you are well below yield, say .25fy)? this question has come up around my office. turnbuckles...sounds like a broken record. riggers often use a cable tensioner - like a turn buckle but it is specifically designed to pre-tension cables - hold them while clamping w/o losing tension. they use them on tall towers, antennaes, etc. any good cable supplier should be able to help __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]