Metal tubes for guardrail

A guardrail comprising:

• a pair of parallel metal tubes each having a section of C, a lengthwise gap, and two first bent ends along the gap, each first bent end having a lengthwise inner section and a lengthwise first groove;
• a pair of inner abutment mechanisms each having a section of U, a horizontal abutment member, a tough defined by two vertical sections and the abutment member, and a pair of second bent ends along the trough, each second bent end having two lengthwise outer sections and two lengthwise second grooves wherein the second bent end is put on the inner section with the outer section inserted into the first groove and the inner section inserted into the second groove for securing each metal tube and the corresponding abutment mechanism together;
• and
• a protective board having either end urged against the abutment member and the first bent ends, thereby securing the protective board between the abutment mechanisms.

A metal tube structure for guardrail comprising:

• an outer metal tube having a section of C, a lengthwise gap, and two first bent ends along the gap, each first bent end being bent to form a lengthwise first groove;
• and
• an inner abutment mechanism having a section U, a horizontal abutment member, a trough defined by two vertical sections and the abutment member, a pair of second bent ends along the trough, each second bent end being bent to form a lengthwise second groove;
• wherein each of the second groove of the second bent end of the inner abutment mechanism is inserted into each corresponding first groove of the first bent end of the outer metal tube for securing the outer metal tube and the inner abutment mechanism together to form a complete assembling metal tube for guardrail.

A metal tube structure for guardrail comprising:

• an outer metal tube having a section of C, a lengthwise gap formed between two flat ends, a horizontal inner section formed perpendicular to each of the flat end;
• and
• an inner abutment mechanism having a horizontal abutment member which has two bent ends each with a groove formed therein;
• wherein each of the horizontal inner sections of the outer metal tube is inserted into each corresponding groove of the inner abutment mechanism together to form a complete assembling metal tube for guardrail.