main beam


Also found in: Acronyms.

Main beam

In floor construction, one of the principal beams which transmits loads directly to the columns.

main beam

A principal beam used to carry a load, which transmits the load directly to the columns.

main beam

main beam
The principal beam of radar.
References in classic literature ?
I lay down on my back, and, naturally, just before I dropped off, my eyes traveled to the roof above me, and then I saw that the main beam which bore the weight of the joists was being slightly shaken from east to west.
The rack's main beams both measured 29 inches with G1s of 5 2/8 and 4 7/8 inches and G2s of 11 7/8 and 13 1/8 inches.
THE GREG WHITENECT BUCK Scorable points 16 (9R, 7L) Tip-to-tip spread 13 6/8 Greatest spread 28 3/8 Inside spread 23 4/8 Total length of abnormal points: 31 1/8 Areas Measured Right Left Difference Main Beam 28 0/8 28 1/8 1/8 1st point (G-1) 6 7/8 8 7/8 2 0/8 2nd point (G-2) 12 1/8 10 7/8 1 2/8 3rd point (G-3) 10 6/8 10 3/8 3/8 4th point (G-4) 6 2/8 5 2/8 1 0/8 1st circ.
TRACY ATCHISON BUCK Phillips County, Kansas Total points 24 (14R, 10L) Greatest spread 23 5/8 Inside spread 19 4/8 Main beams 25 4/8, 21 0/8 Longest tine 12 2/8 Antler bases 6 2/8, 6 2/8 Abnormal points 40 7/8 Gross typical 191 2/8 Deductions 8 6/8 Net NT score 223 3/8
THE JESSY KEGLEY BUCK Scorable points 10 (5R, 5L) Tip-to-tip spread 3 5/8 Greatest spread 20 2/8 Inside spread 17 7/8 Total length of abnormal points: none Areas Measured Right Left Difference Main Beam 28 1/8 28 3/8 2/8 1st point (G-1) 4 3/8 3 7/8 4/8 2nd point (G-2) 12 3/8 13 3/8 1 0/8 3rd point (G-3) 12 1/8 11 7/8 2/8 4th point (G-4) 6 1/8 8 4/8 2 3/8 1st circ.
If you see another driver who has forgotten to turn their main beam off, a quick glance to the left hand kerb will avoid being dazzled.
Perhaps the biggest controversy surrounding the buck was the apparent split in the main beam on the buck's right side.
It is also fitted with lane departure warning, blind spot alerts and an auto main beam function to provide optimum illumination at night.
Inside spread is easily measured, but main beam and point length are troublesome.
There are also trim improvements inside while the new models can be fitted with 'look round corner' headlamps and on cars fitted with ultra-bright xenon lamps an automatic main beam function which uses a camera to detect oncoming traffic at night.
I CAN confirm the accuracy of the points made by Neville Layhe yesterday, concerning the failure of many drivers to use main beam headlights when driving in the dark.
The model features Attention Assist, Adaptive Main Beam Assist, LED daytime driving lights, Blind Spot Assist, Lane Keeping Assist and an optional Speed Limit Assist.