英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
radiobiologia查看　radiobiologia　在百度字典中的解释百度英翻中〔查看〕
radiobiologia查看　radiobiologia　在Google字典中的解释Google英翻中〔查看〕
radiobiologia查看　radiobiologia　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Span Tables - Calculate Joist, Rafter and Wood Beam Spans
    Use the span tables in the links below to determine the maximum allowable lengths of joists and rafters These tables provide maximum spans for the #2 grades of four common species of lumber (Southern Pine, Douglas Fir, Hem-fir, and Spruce-pine-fir (SPF)
  • Understanding Loads and Using Span Tables - American Wood Council
    A complete analysis of wood’s mechanical properties is complex, but understanding a few basics of lumber strength will allow you to size joists and rafters with the use of span tables Let’s start by taking a broad view
  • Wood Grades: The 5 Eastern SPF Lumber Grades - LENCO
    Wood grading might seem complex, but understanding the basic categories can significantly impact your project’s outcome By selecting the right grade for the right purpose, you ensure the structural integrity, aesthetic quality, and cost-effectiveness of your projects
  • LUMBER DESIGN VALUES AND FRAMING SPANS - Bright Wood
    Design Criteria: Strength - 40 lbs per sq ft live load, plus 10 lbs per sq ft dead load Deflection - Limited in span in inches divided by 360 for live load only
  • Lumber Grades Explained - Thomasnet
    Number 2A Common grade, referred to as Economy grade, has lower yield and board size requirements and is often used in the hardwood flooring small furniture components industries The Number 2A Common grade requires: A minimum board size of 3” wide and 4’ long; A clear face yield of 50% up to just under number 1 Common yield of 66-2 3%
  • Span Tables Design Values for Joists, Rafters, Headers . . .
    Span tables and design values for a variety of western lumber species Links to span tables and associated design values offered by industry organizations for various wood species and products
  • Wood Beam Span Calculator - Calculate Max Span of Wood Beam
    This calculator takes into account the strength properties of different wood types, the dimensions of the beam, and the expected loads it will bear By inputting these parameters, users can quickly determine how far a beam can safely span without requiring additional support





中文字典-英文字典  2005-2009