What is ASME BTH 1?
What is ASME BTH 1?
BTH-1 provides minimum structural, mechanical, and electrical design criteria for ASME B30. 20, Below-the- Hook Lifting Devices. ASME B30. 20 includes provisions that apply to the marking, construction, installation, inspection, testing, maintenance, and operation of below-the-hook lifting devices.
What is a below-the-hook lifting device?
The device may contain components such as slings, hooks, and rigging hardware…” In other words, a below-the-hook (BTH) lifting device is a tool or mechanical device that attaches to a crane or other lifting apparatus, and grabs and secures a load so that it can be moved safely from one location to another.
How do you make a lifting lug?
The basic design of a lifting lug consists of the following four parts;
- the design of lug plate,
- verifying the weld used to connect it to a shell or structure,
- checking the bearing stress at the pin-hole and.
- confirming the end area of the lug.
What is ASME B30?
ASME B30 is identified as the “Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings.” Every couple of years, the B30 Committee reviews, revises, and amends their existing standards and releases a new edition.
What is the purpose of a lifting fixture?
Lifting Devices (see definition below) are used to minimize the hazards associated with materials handling operations; some examples include cranes, hoists, lift trucks, scissor lifts, lift tables and forklifts.
What is a lifting lug?
Small projections attached to, or built into, heavy components. The lugs have an opening in the center to which cables can be attached for lifting. Lifting lugs are in the construction of storage tanks and multi-grade dispensers. Some tank manufacturers insert threaded lifting lugs in pipe openings.
What is a lifting point?
Lifting points represent the connection between load and lifting gear. Chain slings, wire rope slings, lifting slings, etc. are used if loads have to be lifted or moved. They are fastened to the lifting points in order, for example, to lift the corresponding load.
How many degrees can a crawler crane operate at?
Crawler cranes are composed of a standard cab mounted on a crawler undercarriage. The undercarriage uses tracks instead of wheels to navigate the terrain in construction sites. Additionally, the upper deck rotates a full 360 degrees, and it features a box or lattice boom with an optional extension.
What is a lifting device called?
elevator, lift – lifting device consisting of a platform or cage that is raised and lowered mechanically in a vertical shaft in order to move people from one floor to another in a building.
What is used to lift heavy objects?
pulley. a piece of equipment used for lifting something very heavy. It consists of one or more wheels, around which you pull a rope or chain that is fastened to the thing that you want to lift.
What are lifting lugs used for?
Small projections attached to, or built into, heavy components. The lugs have an opening in the center to which cables can be attached for lifting. Lifting lugs are in the construction of storage tanks and multi-grade dispensers.
What is a lug joint?
Lug joints are special type of pin joints, which are widely used for joining various parts of an aircraft, especially for joining wings to fuselage. During service, the lug type joints are subjected to fatigue loading and complete load transfer takes place through the pin.