Building Construction
The type of joint commonly used at the junction of a principal rafter and tie beam in timber trusses is

Mitred joint
Oblique mortise and tenon joint
Butt joint
Mortise and tenon joint

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Building Construction
Grillage foundation

Does not require deep cutting as the required base area with required pressure intensity is obtained at a shallow depth
Is light and economical
All listed here
Is used to transfer heavy structural loads from steel columns to a soil having low bearing capacity

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