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  2. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    A socket cap screw, also known as a socket head capscrew, socket screw, or Allen bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole. The term socket head capscrew typically refers to a type of threaded fastener whose head diameter is nominally 1.5 times that of the screw shank ( major ) diameter, with a head height ...

  3. ASTM A325 - Wikipedia

    en.wikipedia.org/wiki/ASTM_A325

    ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength. It defines mechanical properties for bolts that range from 1 ⁄ 2 to 1 + 1 ⁄ 2 inches (13 to 38 mm) in diameter. [1]

  4. List of DIN standards - Wikipedia

    en.wikipedia.org/wiki/List_of_DIN_standards

    Hexagon socket head cap screws with low head: Active: DIN 7985: Cross recessed raised Phillips Pan head screws: Withdrawn: DIN EN ISO 7045: ISO 7045: DIN 7989-1: Washers for steel structures – Product grade C: Active: DIN 7989-2: Washers for steel structures – Product grade A: Active: DIN 7991: Hexagon socket countersunk head cap screws ...

  5. Furniture screw - Wikipedia

    en.wikipedia.org/wiki/Furniture_screw

    Furniture screws come with many different types of screw heads. [3] In older times, screws with slotted heads were often used in furniture, but these types of screw heads are usually avoided in modern furniture in favor of more practical tool slots. [4] Popular options in the 2020s include Phillips, Torx and hex heads. [citation needed]

  6. Framing (construction) - Wikipedia

    en.wikipedia.org/wiki/Framing_(construction)

    Light-frame materials are most often wood or rectangular steel, tubes or C-channels. Wood pieces are typically connected with nail fasteners, nails, or screws; steel pieces are connected with pan-head framing screws, or nuts and bolts. Preferred species for linear structural members are softwoods such as spruce, pine and fir.

  7. Open web steel joist - Wikipedia

    en.wikipedia.org/wiki/Open_web_steel_joist

    The main function of an OWSJ is to provide direct support for roof or floor deck and to transfer the load imposed on the deck to the structural frame i.e. beam and column. In order to accurately design an OWSJ, engineers consider the joist span between bearing points, joist spacing, slope, live loads , dead loads , collateral loads, seismic ...

  8. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    This is in hopes that it will enhance the beauty and style of a product. Instead of covering up the screw head that it serves as an aesthetic part of the design. Ten different recess sizes are available for the Mortorq. The smallest of these, the PMT-000 can be used with screws that have a head diameter as small as 2.5 mm.

  9. Rigid frame - Wikipedia

    en.wikipedia.org/wiki/Rigid_frame

    In structural engineering, a rigid frame is the load-resisting skeleton constructed with straight or curved members interconnected by predominantly rigid connections, which resist movements induced at the joints of members.

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