Solved Problem 14 | Rectangular Parallelepiped Jhun Vert Sat, 05/02/2020 - 04:40 pm

Problem 14
Find the angles that the diagonals of the rectangular parallelepiped 2 in. by 3 in. by 4 in. makes with the faces.

Solved Problem 13 | Rectangular Parallelepiped Jhun Vert Sat, 05/02/2020 - 04:36 pm

Problem 13
The figure represents a rectangular parallelepiped; AD = 20 in., AB = 10 in., AE = 15 in.
(a) Find the number of degrees in the angles AFB, BFO, AFO, BOF, AOF, OFC.
(b) Find the area of each of the triangles ABO, BOF, AOF.
(c) Find the perpendicular distance from B to the plane AOF.

Area, angle, and distance in rectangular parallelepiped.


Solution to Problem 597 | Spacing of Rivets or Bolts in Built-Up Beams Jhun Vert Thu, 04/23/2020 - 01:41 pm

Problem 597
A plate and angle girder similar to that shown in Fig. 5-32 is fabricated by riveting the short legs of four 125 × 75 × 13 mm angles to a web plate 1000 mm by 10 mm to form a section 1020 mm deep. Cover plates, each 300 mm × 10 mm, are then riveted to the flange angles making the overall height 1040 mm. The moment of inertia of the entire section about the NA is I = 4770 × 106 mm4. Using the allowable stresses specified in Illustrative Problem 591, determine the rivet pitch for 22-mm rivets, attaching the angles to the web plate at a section where V = 450 kN.

From Illustrative Problem 591

τ = 100 MPa shear stress
σb = 220 MPa bearing stress for single shear rivet
σb = 280 MPa bearing stress for double shear rivet


Built-up Girder from Plate and Angles